rnd-20131212-1-src
[rocksndiamonds.git] / src / libgame / sound.c
index d451e6ecf58616a0f5403a815059974bcb917a98..2712fa4c92970aefb7a98a5da4cd7071c5b4fad3 100644 (file)
@@ -1,7 +1,7 @@
 /***********************************************************
 * Artsoft Retro-Game Library                               *
 *----------------------------------------------------------*
-* (c) 1994-2001 Artsoft Entertainment                      *
+* (c) 1994-2006 Artsoft Entertainment                      *
 *               Holger Schemel                             *
 *               Detmolder Strasse 189                      *
 *               33604 Bielefeld                            *
 * sound.c                                                  *
 ***********************************************************/
 
-#include <string.h>
+#include <sys/types.h>
 #include <sys/time.h>
+#include <string.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <dirent.h>
 #include <signal.h>
+#include <math.h>
+#include <errno.h>
+
+#include "platform.h"
+
+#if defined(PLATFORM_LINUX)
+#include <sys/ioctl.h>
+#include <linux/soundcard.h>
+#elif defined(PLATFORM_FREEBSD)
+#include <machine/soundcard.h>
+#elif defined(PLATFORM_NETBSD)
+#include <sys/ioctl.h>
+#include <sys/audioio.h>
+#elif defined(PLATFORM_HPUX)
+#include <sys/audio.h>
+#endif
 
 #include "system.h"
 #include "sound.h"
 #include "misc.h"
 #include "setup.h"
+#include "text.h"
+
+
+/* expiration time (in milliseconds) for sound loops */
+#define SOUND_LOOP_EXPIRATION_TIME     200
+
+/* one second fading interval == 1000 ticks (milliseconds) */
+#define SOUND_FADING_INTERVAL          1000
+
+#if defined(AUDIO_STREAMING_DSP)
+#define SOUND_FADING_VOLUME_STEP       (SOUND_MAX_VOLUME / 40)
+#define SOUND_FADING_VOLUME_THRESHOLD  (SOUND_FADING_VOLUME_STEP * 2)
+#endif
+
+#define SND_TYPE_NONE                  0
+#define SND_TYPE_WAV                   1
+
+#define MUS_TYPE_NONE                  0
+#define MUS_TYPE_WAV                   1
+#define MUS_TYPE_MOD                   2
+
+#define DEVICENAME_DSP                 "/dev/dsp"
+#define DEVICENAME_SOUND_DSP           "/dev/sound/dsp"
+#define DEVICENAME_AUDIO               "/dev/audio"
+#define DEVICENAME_AUDIOCTL            "/dev/audioCtl"
 
+#define SOUND_VOLUME_LEFT(x)           (stereo_volume[x])
+#define SOUND_VOLUME_RIGHT(x)          (stereo_volume[SOUND_MAX_LEFT2RIGHT-x])
 
-#define IS_PARENT_PROCESS(pid)         ((pid) > 0)
-#define IS_CHILD_PROCESS(pid)          ((pid) == 0)
+#define SAME_SOUND_NR(x,y)             ((x).nr == (y).nr)
+#define SAME_SOUND_DATA(x,y)           ((x).data_ptr == (y).data_ptr)
 
-struct ListNode
+#define SOUND_VOLUME_FROM_PERCENT(v,p) ((p) < 0   ? SOUND_MIN_VOLUME : \
+                                        (p) > 100 ? (v) :              \
+                                        (p) * (v) / 100)
+
+#define SOUND_VOLUME_SIMPLE(v) SOUND_VOLUME_FROM_PERCENT(v, setup.volume_simple)
+#define SOUND_VOLUME_LOOPS(v)  SOUND_VOLUME_FROM_PERCENT(v, setup.volume_loops)
+#define SOUND_VOLUME_MUSIC(v)  SOUND_VOLUME_FROM_PERCENT(v, setup.volume_music)
+
+#define SETUP_SOUND_VOLUME(v,s)                ((s) == SND_CTRL_PLAY_MUSIC ?   \
+                                        SOUND_VOLUME_MUSIC(v) :        \
+                                        (s) == SND_CTRL_PLAY_LOOP ?    \
+                                        SOUND_VOLUME_LOOPS(v) :        \
+                                        SOUND_VOLUME_SIMPLE(v))
+
+
+#if defined(AUDIO_UNIX_NATIVE)
+struct SoundHeader_WAV
+{
+  unsigned short compression_code;
+  unsigned short num_channels;
+  unsigned int   sample_rate;
+  unsigned int   bytes_per_second;
+  unsigned short block_align;
+  unsigned short bits_per_sample;
+};
+#endif
+
+struct AudioFormatInfo
 {
-  char *key;
-  void *content;
-  struct ListNode *next;
+  boolean stereo;              /* availability of stereo sound */
+  int format;                  /* size and endianess of sample data */
+  int sample_rate;             /* sample frequency */
+  int fragment_size;           /* audio device fragment size in bytes */
+};
+
+struct SampleInfo
+{
+  char *source_filename;
+  int num_references;
+
+  int type;
+  int format;
+  void *data_ptr;              /* pointer to first sample (8 or 16 bit) */
+  int data_len;                        /* number of samples, NOT number of bytes */
+  int num_channels;            /* mono: 1 channel, stereo: 2 channels */
+};
+typedef struct SampleInfo SoundInfo;
+typedef struct SampleInfo MusicInfo;
+
+struct SoundControl
+{
+  boolean active;
+
+  int nr;
+  int volume;
+  int stereo_position;
+
+  int state;
+
+  unsigned int playing_starttime;
+  unsigned int playing_pos;
+
+  int type;
+  int format;
+  void *data_ptr;              /* pointer to first sample (8 or 16 bit) */
+  int data_len;                /* number of samples, NOT number of bytes */
+  int num_channels;            /* mono: 1 channel, stereo: 2 channels */
+
+#if defined(TARGET_ALLEGRO)
+  int voice;
+#endif
 };
-typedef struct ListNode ListNode;
+typedef struct SoundControl SoundControl;
 
-static ListNode *newListNode(void);
-static void addNodeToList(ListNode **, char *, void *);
-static void deleteNodeFromList(ListNode **, char *, void (*function)(void *));
-static ListNode *getNodeFromKey(ListNode *, char *);
-static int getNumNodes(ListNode *);
+static struct ArtworkListInfo *sound_info = NULL;
+static struct ArtworkListInfo *music_info = NULL;
 
+static MusicInfo **Music_NoConf = NULL;
 
-static struct SoundEffectInfo *sound_effect;
-static ListNode *SoundFileList = NULL;
-static SoundInfo **Sound = NULL;
-static MusicInfo **Music = NULL;
-static int num_sounds = 0, num_music = 0;
+static int num_music_noconf = 0;
+static int stereo_volume[SOUND_MAX_LEFT2RIGHT + 1];
 
 
 /* ========================================================================= */
 /* THE STUFF BELOW IS ONLY USED BY THE SOUND SERVER CHILD PROCESS            */
 
-static struct AudioFormatInfo afmt;
 static struct SoundControl mixer[NUM_MIXER_CHANNELS];
 static int mixer_active_channels = 0;
 
-/* forward declaration of internal functions */
-static void InitAudioDevice(struct AudioFormatInfo *);
-static void Mixer_Main(void);
+#if defined(AUDIO_UNIX_NATIVE)
+static struct AudioFormatInfo afmt;
 
-#if defined(PLATFORM_UNIX) && !defined(AUDIO_STREAMING_DSP)
+static void Mixer_Main(void);
+#if !defined(AUDIO_STREAMING_DSP)
 static unsigned char linear_to_ulaw(int);
 static int ulaw_to_linear(unsigned char);
 #endif
+#endif
 
 static void ReloadCustomSounds();
 static void ReloadCustomMusic();
 static void FreeSound(void *);
+static void FreeMusic(void *);
+static void FreeAllMusic_NoConf();
+
+static SoundInfo *getSoundInfoEntryFromSoundID(int);
+static MusicInfo *getMusicInfoEntryFromMusicID(int);
+
+
+/* ------------------------------------------------------------------------- */
+/* functions for native (non-SDL) Unix audio/mixer support                   */
+/* ------------------------------------------------------------------------- */
+
+#if defined(AUDIO_UNIX_NATIVE)
 
-#if defined(PLATFORM_UNIX)
 static int OpenAudioDevice(char *audio_device_name)
 {
   int audio_device_fd;
@@ -103,13 +219,14 @@ static boolean TestAudioDevices(void)
   static char *audio_device_name[] =
   {
     DEVICENAME_DSP,
+    DEVICENAME_SOUND_DSP,
     DEVICENAME_AUDIO
   };
   int audio_device_fd = -1;
   int i;
 
   /* look for available audio devices, starting with preferred ones */
-  for (i=0; i<sizeof(audio_device_name)/sizeof(char *); i++)
+  for (i = 0; i < sizeof(audio_device_name)/sizeof(char *); i++)
     if ((audio_device_fd = OpenAudioDevice(audio_device_name[i])) >= 0)
       break;
 
@@ -126,7 +243,6 @@ static boolean TestAudioDevices(void)
   return TRUE;
 }
 
-#if !defined(TARGET_SDL)
 static boolean ForkAudioProcess(void)
 {
   if (pipe(audio.mixer_pipe) < 0)
@@ -141,14 +257,16 @@ static boolean ForkAudioProcess(void)
     return FALSE;
   }
 
-  if (IS_CHILD_PROCESS(audio.mixer_pid))
+  if (audio.mixer_pid == 0)            /* we are the child process */
+    audio.mixer_pid = getpid();
+
+  if (IS_CHILD_PROCESS())
     Mixer_Main();                      /* this function never returns */
   else
     close(audio.mixer_pipe[0]);                /* no reading from pipe needed */
 
   return TRUE;
 }
-#endif
 
 void UnixOpenAudio(void)
 {
@@ -173,13 +291,174 @@ void UnixCloseAudio(void)
   if (audio.device_fd)
     close(audio.device_fd);
 
-  if (IS_PARENT_PROCESS(audio.mixer_pid))
+  if (IS_PARENT_PROCESS() && HAS_CHILD_PROCESS())
     kill(audio.mixer_pid, SIGTERM);
 }
 
+
+/* ------------------------------------------------------------------------- */
+/* functions for platform specific audio device initialization               */
+/* ------------------------------------------------------------------------- */
+
+#if defined(AUDIO_LINUX_IOCTL)
+static void InitAudioDevice_Linux(struct AudioFormatInfo *afmt)
+{
+  /* "ioctl()" expects pointer to 'int' value for stereo flag
+     (boolean is defined as 'char', which will not work here) */
+  unsigned int fragment_spec = 0;
+  int fragment_size_query = -1;
+  int stereo = TRUE;
+  struct
+  {
+    int format_ioctl;
+    int format_result;
+  }
+  formats[] =
+  {
+    /* supported audio format in preferred order */
+    { AFMT_S16_LE,     AUDIO_FORMAT_S16 | AUDIO_FORMAT_LE },
+    { AFMT_S16_BE,     AUDIO_FORMAT_S16 | AUDIO_FORMAT_BE },
+    { AFMT_U8,         AUDIO_FORMAT_U8                    },
+    { -1,              -1 }
+  };
+  int i;
+
+  /* determine logarithm (log2) of the fragment size */
+  while ((1 << fragment_spec) < afmt->fragment_size)
+    fragment_spec++;
+
+  /* use two fragments (play one fragment, prepare the other);
+     one fragment would result in interrupted audio output, more
+     than two fragments would raise audio output latency to much */
+  fragment_spec |= 0x00020000;
+
+  /* Example for fragment specification:
+     - 2 buffers / 512 bytes (giving 1/16 second resolution for 8 kHz)
+     - (with stereo the effective buffer size will shrink to 256)
+     => fragment_size = 0x00020009 */
+
+  if (ioctl(audio.device_fd, SNDCTL_DSP_SETFRAGMENT, &fragment_spec) < 0)
+    Error(ERR_EXIT_SOUND_SERVER,
+         "cannot set fragment size of audio device -- no sounds");
+
+  i = 0;
+  afmt->format = 0;
+  while (formats[i].format_result != -1)
+  {
+    unsigned int audio_format = formats[i].format_ioctl;
+    if (ioctl(audio.device_fd, SNDCTL_DSP_SETFMT, &audio_format) == 0)
+    {
+      afmt->format = formats[i].format_result;
+      break;
+    }
+  }
+
+  if (afmt->format == 0)       /* no supported audio format found */
+    Error(ERR_EXIT_SOUND_SERVER,
+         "cannot set audio format of audio device -- no sounds");
+
+  /* try if we can use stereo sound */
+  afmt->stereo = TRUE;
+  if (ioctl(audio.device_fd, SNDCTL_DSP_STEREO, &stereo) < 0)
+    afmt->stereo = FALSE;
+
+  if (ioctl(audio.device_fd, SNDCTL_DSP_SPEED, &afmt->sample_rate) < 0)
+    Error(ERR_EXIT_SOUND_SERVER,
+         "cannot set sample rate of audio device -- no sounds");
+
+  /* get the real fragmentation size; this should return 512 */
+  if (ioctl(audio.device_fd, SNDCTL_DSP_GETBLKSIZE, &fragment_size_query) < 0)
+    Error(ERR_EXIT_SOUND_SERVER,
+         "cannot get fragment size of audio device -- no sounds");
+  if (fragment_size_query != afmt->fragment_size)
+    Error(ERR_EXIT_SOUND_SERVER,
+         "cannot set fragment size of audio device -- no sounds");
+}
+#endif /* AUDIO_LINUX_IOCTL */
+
+#if defined(PLATFORM_NETBSD)
+static void InitAudioDevice_NetBSD(struct AudioFormatInfo *afmt)
+{
+  audio_info_t a_info;
+  boolean stereo = TRUE;
+
+  AUDIO_INITINFO(&a_info);
+  a_info.play.encoding = AUDIO_ENCODING_LINEAR8;
+  a_info.play.precision = 8;
+  a_info.play.channels = 2;
+  a_info.play.sample_rate = afmt->sample_rate;
+  a_info.blocksize = afmt->fragment_size;
+
+  afmt->format = AUDIO_FORMAT_U8;
+  afmt->stereo = TRUE;
+
+  if (ioctl(audio.device_fd, AUDIO_SETINFO, &a_info) < 0)
+  {
+    /* try to disable stereo */
+    a_info.play.channels = 1;
+
+    afmt->stereo = FALSE;
+
+    if (ioctl(audio.device_fd, AUDIO_SETINFO, &a_info) < 0)
+      Error(ERR_EXIT_SOUND_SERVER,
+           "cannot set sample rate of audio device -- no sounds");
+  }
+}
+#endif /* PLATFORM_NETBSD */
+
+#if defined(PLATFORM_HPUX)
+static void InitAudioDevice_HPUX(struct AudioFormatInfo *afmt)
+{
+  struct audio_describe ainfo;
+  int audio_ctl;
+
+  audio_ctl = open("/dev/audioCtl", O_WRONLY | O_NDELAY);
+  if (audio_ctl == -1)
+    Error(ERR_EXIT_SOUND_SERVER, "cannot open audio device -- no sounds");
+
+  if (ioctl(audio_ctl, AUDIO_DESCRIBE, &ainfo) == -1)
+    Error(ERR_EXIT_SOUND_SERVER, "no audio info -- no sounds");
+
+  if (ioctl(audio_ctl, AUDIO_SET_DATA_FORMAT, AUDIO_FORMAT_ULAW) == -1)
+    Error(ERR_EXIT_SOUND_SERVER, "ulaw audio not available -- no sounds");
+
+  ioctl(audio_ctl, AUDIO_SET_CHANNELS, 1);
+  ioctl(audio_ctl, AUDIO_SET_SAMPLE_RATE, 8000);
+
+  afmt->format = AUDIO_FORMAT_U8;
+  afmt->stereo = FALSE;
+  afmt->sample_rate = 8000;
+
+  close(audio_ctl);
+}
+#endif /* PLATFORM_HPUX */
+
+static void InitAudioDevice(struct AudioFormatInfo *afmt)
+{
+  afmt->stereo = TRUE;
+  afmt->format = AUDIO_FORMAT_UNKNOWN;
+  afmt->sample_rate = DEFAULT_AUDIO_SAMPLE_RATE;
+  afmt->fragment_size = DEFAULT_AUDIO_FRAGMENT_SIZE;
+
+#if defined(AUDIO_LINUX_IOCTL)
+  InitAudioDevice_Linux(afmt);
+#elif defined(PLATFORM_NETBSD)
+  InitAudioDevice_NetBSD(afmt);
+#elif defined(PLATFORM_HPUX)
+  InitAudioDevice_HPUX(afmt);
+#else
+  /* generic /dev/audio stuff might be placed here */
+#endif
+}
+
+
+/* ------------------------------------------------------------------------- */
+/* functions for communication between main process and sound mixer process  */
+/* ------------------------------------------------------------------------- */
+
 static void SendSoundControlToMixerProcess(SoundControl *snd_ctrl)
 {
-  if (IS_CHILD_PROCESS(audio.mixer_pid))
+  if (IS_CHILD_PROCESS())
     return;
 
   if (write(audio.mixer_pipe[1], snd_ctrl, sizeof(SoundControl)) < 0)
@@ -192,7 +471,7 @@ static void SendSoundControlToMixerProcess(SoundControl *snd_ctrl)
 
 static void ReadSoundControlFromMainProcess(SoundControl *snd_ctrl)
 {
-  if (IS_PARENT_PROCESS(audio.mixer_pid))
+  if (IS_PARENT_PROCESS())
     return;
 
   if (read(audio.mixer_pipe[0], snd_ctrl, sizeof(SoundControl))
@@ -200,45 +479,62 @@ static void ReadSoundControlFromMainProcess(SoundControl *snd_ctrl)
     Error(ERR_EXIT_SOUND_SERVER, "broken pipe -- no sounds");
 }
 
-static void WriteReloadInfoToPipe(char *set_name, int type)
+static void WriteReloadInfoToPipe(char *set_identifier, int type)
 {
   SoundControl snd_ctrl;
   TreeInfo *ti = (type == SND_CTRL_RELOAD_SOUNDS ? artwork.snd_current :
                  artwork.mus_current);
-  unsigned long str_size1 = strlen(leveldir_current->fullpath) + 1;
-  unsigned long str_size2 = strlen(ti->basepath) + 1;
-  unsigned long str_size3 = strlen(ti->fullpath) + 1;
-
-  if (IS_CHILD_PROCESS(audio.mixer_pid))
+  unsigned int str_size1 = strlen(leveldir_current->fullpath) + 1;
+  unsigned int str_size2 = strlen(leveldir_current->sounds_path) + 1;
+  unsigned int str_size3 = strlen(leveldir_current->music_path) + 1;
+  unsigned int str_size4 = strlen(ti->basepath) + 1;
+  unsigned int str_size5 = strlen(ti->fullpath) + 1;
+  boolean override_level_artwork = (type == SND_CTRL_RELOAD_SOUNDS ?
+                                   gfx.override_level_sounds :
+                                   gfx.override_level_music);
+
+  if (IS_CHILD_PROCESS())
     return;
 
   if (leveldir_current == NULL)                /* should never happen */
     Error(ERR_EXIT, "leveldir_current == NULL");
 
+  clear_mem(&snd_ctrl, sizeof(SoundControl));  /* to make valgrind happy */
+
   snd_ctrl.active = FALSE;
   snd_ctrl.state = type;
-  snd_ctrl.data_len = strlen(set_name) + 1;
+  snd_ctrl.data_len = strlen(set_identifier) + 1;
 
   if (write(audio.mixer_pipe[1], &snd_ctrl,
            sizeof(snd_ctrl)) < 0 ||
-      write(audio.mixer_pipe[1], set_name,
+      write(audio.mixer_pipe[1], set_identifier,
            snd_ctrl.data_len) < 0 ||
+      write(audio.mixer_pipe[1], &override_level_artwork,
+           sizeof(boolean)) < 0 ||
       write(audio.mixer_pipe[1], leveldir_current,
            sizeof(TreeInfo)) < 0 ||
       write(audio.mixer_pipe[1], ti,
            sizeof(TreeInfo)) < 0 ||
       write(audio.mixer_pipe[1], &str_size1,
-           sizeof(unsigned long)) < 0 ||
+           sizeof(unsigned int)) < 0 ||
       write(audio.mixer_pipe[1], &str_size2,
-           sizeof(unsigned long)) < 0 ||
+           sizeof(unsigned int)) < 0 ||
       write(audio.mixer_pipe[1], &str_size3,
-           sizeof(unsigned long)) < 0 ||
+           sizeof(unsigned int)) < 0 ||
+      write(audio.mixer_pipe[1], &str_size4,
+           sizeof(unsigned int)) < 0 ||
+      write(audio.mixer_pipe[1], &str_size5,
+           sizeof(unsigned int)) < 0 ||
       write(audio.mixer_pipe[1], leveldir_current->fullpath,
            str_size1) < 0 ||
-      write(audio.mixer_pipe[1], ti->basepath,
+      write(audio.mixer_pipe[1], leveldir_current->sounds_path,
            str_size2) < 0 ||
+      write(audio.mixer_pipe[1], leveldir_current->music_path,
+           str_size3) < 0 ||
+      write(audio.mixer_pipe[1], ti->basepath,
+           str_size4) < 0 ||
       write(audio.mixer_pipe[1], ti->fullpath,
-           str_size3) < 0)
+           str_size5) < 0)
   {
     Error(ERR_WARN, "cannot pipe to child process -- no sounds");
     audio.sound_available = audio.sound_enabled = FALSE;
@@ -251,122 +547,208 @@ static void ReadReloadInfoFromPipe(SoundControl *snd_ctrl)
   TreeInfo **ti_ptr = ((snd_ctrl->state & SND_CTRL_RELOAD_SOUNDS) ?
                       &artwork.snd_current : &artwork.mus_current);
   TreeInfo *ti = *ti_ptr;
-  unsigned long str_size1, str_size2, str_size3;
-  static char *set_name = NULL;
+  unsigned int str_size1, str_size2, str_size3, str_size4, str_size5;
+  static char *set_identifier = NULL;
+  boolean *override_level_artwork = (snd_ctrl->state & SND_CTRL_RELOAD_SOUNDS ?
+                                    &gfx.override_level_sounds :
+                                    &gfx.override_level_music);
 
-  if (set_name)
-    free(set_name);
+  checked_free(set_identifier);
 
-  set_name = checked_malloc(snd_ctrl->data_len);
+  set_identifier = checked_malloc(snd_ctrl->data_len);
 
   if (leveldir_current == NULL)
     leveldir_current = checked_calloc(sizeof(TreeInfo));
+
   if (ti == NULL)
     ti = *ti_ptr = checked_calloc(sizeof(TreeInfo));
-  if (leveldir_current->fullpath != NULL)
-    free(leveldir_current->fullpath);
-  if (ti->basepath != NULL)
-    free(ti->basepath);
-  if (ti->fullpath != NULL)
-    free(ti->fullpath);
-
-  if (read(audio.mixer_pipe[0], set_name,
+
+  checked_free(leveldir_current->fullpath);
+  checked_free(leveldir_current->sounds_path);
+  checked_free(leveldir_current->music_path);
+  checked_free(ti->basepath);
+  checked_free(ti->fullpath);
+
+  if (read(audio.mixer_pipe[0], set_identifier,
           snd_ctrl->data_len) != snd_ctrl->data_len ||
+      read(audio.mixer_pipe[0], override_level_artwork,
+          sizeof(boolean)) != sizeof(boolean) ||
       read(audio.mixer_pipe[0], leveldir_current,
           sizeof(TreeInfo)) != sizeof(TreeInfo) ||
       read(audio.mixer_pipe[0], ti,
           sizeof(TreeInfo)) != sizeof(TreeInfo) ||
       read(audio.mixer_pipe[0], &str_size1,
-          sizeof(unsigned long)) != sizeof(unsigned long) ||
+          sizeof(unsigned int)) != sizeof(unsigned int) ||
       read(audio.mixer_pipe[0], &str_size2,
-          sizeof(unsigned long)) != sizeof(unsigned long) ||
+          sizeof(unsigned int)) != sizeof(unsigned int) ||
       read(audio.mixer_pipe[0], &str_size3,
-          sizeof(unsigned long)) != sizeof(unsigned long))
+          sizeof(unsigned int)) != sizeof(unsigned int) ||
+      read(audio.mixer_pipe[0], &str_size4,
+          sizeof(unsigned int)) != sizeof(unsigned int) ||
+      read(audio.mixer_pipe[0], &str_size5,
+          sizeof(unsigned int)) != sizeof(unsigned int))
     Error(ERR_EXIT_SOUND_SERVER, "broken pipe -- no sounds");
 
   leveldir_current->fullpath = checked_calloc(str_size1);
-  ti->basepath = checked_calloc(str_size2);
-  ti->fullpath = checked_calloc(str_size3);
+  leveldir_current->sounds_path = checked_calloc(str_size2);
+  leveldir_current->music_path = checked_calloc(str_size3);
+  ti->basepath = checked_calloc(str_size4);
+  ti->fullpath = checked_calloc(str_size5);
 
   if (read(audio.mixer_pipe[0], leveldir_current->fullpath,
           str_size1) != str_size1 ||
-      read(audio.mixer_pipe[0], ti->basepath,
+      read(audio.mixer_pipe[0], leveldir_current->sounds_path,
           str_size2) != str_size2 ||
+      read(audio.mixer_pipe[0], leveldir_current->music_path,
+          str_size3) != str_size3 ||
+      read(audio.mixer_pipe[0], ti->basepath,
+          str_size4) != str_size4 ||
       read(audio.mixer_pipe[0], ti->fullpath,
-          str_size3) != str_size3)
+          str_size5) != str_size5)
     Error(ERR_EXIT_SOUND_SERVER, "broken pipe -- no sounds");
 
   if (snd_ctrl->state & SND_CTRL_RELOAD_SOUNDS)
-    artwork.sounds_set_current = set_name;
+    artwork.snd_current_identifier = set_identifier;
   else
-    artwork.music_set_current = set_name;
+    artwork.mus_current_identifier = set_identifier;
 }
-#endif /* PLATFORM_UNIX */
+
+#endif /* AUDIO_UNIX_NATIVE */
+
+
+/* ------------------------------------------------------------------------- */
+/* mixer functions                                                           */
+/* ------------------------------------------------------------------------- */
 
 void Mixer_InitChannels()
 {
   int i;
 
-  for(i=0; i<audio.num_channels; i++)
+  for (i = 0; i < audio.num_channels; i++)
     mixer[i].active = FALSE;
   mixer_active_channels = 0;
 }
 
-static void Mixer_PlayChannel(int channel)
+static void Mixer_ResetChannelExpiration(int channel)
 {
-  /* start with inactive channel in case something goes wrong */
-  mixer[channel].active = FALSE;
+  mixer[channel].playing_starttime = Counter();
 
-  if (IS_MUSIC_MODULE(mixer[channel]))
-    return;
+#if defined(TARGET_SDL)
+  if (IS_LOOP(mixer[channel]) && !IS_MUSIC(mixer[channel]))
+    Mix_ExpireChannel(channel, SOUND_LOOP_EXPIRATION_TIME);
+#endif
+}
+
+static boolean Mixer_ChannelExpired(int channel)
+{
+  if (!mixer[channel].active)
+    return TRUE;
 
-  mixer[channel].playingpos = 0;
-  mixer[channel].playingtime = 0;
+  if (IS_LOOP(mixer[channel]) && !IS_MUSIC(mixer[channel]) &&
+      DelayReached(&mixer[channel].playing_starttime,
+                  SOUND_LOOP_EXPIRATION_TIME))
+    return TRUE;
 
 #if defined(TARGET_SDL)
-  Mix_Volume(channel, SOUND_MAX_VOLUME);
-  Mix_PlayChannel(channel, mixer[channel].data_ptr,
-                 IS_LOOP(mixer[channel]) ? -1 : 0);
-#elif defined(PLATFORM_MSDOS)
-  mixer[channel].voice = allocate_voice((SAMPLE *)mixer[channel].data_ptr);
-  if (mixer[channel].voice < 0)
-    return;
 
-  if (IS_LOOP(mixer[channel]))
-    voice_set_playmode(mixer[channel].voice, PLAYMODE_LOOP);
+  if (!Mix_Playing(channel))
+    return TRUE;
 
-  voice_set_volume(mixer[channel].voice, mixer[channel].volume);
-  voice_set_pan(mixer[channel].voice, mixer[channel].stereo);
-  voice_start(mixer[channel].voice);       
-#endif
+#elif defined(TARGET_ALLEGRO)
 
-  mixer[channel].active = TRUE;
-  mixer_active_channels++;
+  mixer[channel].playing_pos = voice_get_position(mixer[channel].voice);
+  mixer[channel].volume = voice_get_volume(mixer[channel].voice);
+
+  /* sound sample has completed playing or was completely faded out */
+  if (mixer[channel].playing_pos == -1 || mixer[channel].volume == 0)
+    return TRUE;
+
+#endif /* TARGET_ALLEGRO */
+
+  return FALSE;
 }
 
-static void Mixer_PlayMusicChannel()
+static boolean Mixer_AllocateChannel(int channel)
 {
-  Mixer_PlayChannel(audio.music_channel);
-
-#if defined(TARGET_SDL)
-  if (IS_MUSIC_MODULE(mixer[audio.music_channel]))
-  {
-    /* Mix_VolumeMusic() must be called _after_ Mix_PlayMusic() --
-       this looks like a bug in the SDL_mixer library */
-    Mix_PlayMusic(mixer[audio.music_channel].data_ptr, -1);
-    Mix_VolumeMusic(SOUND_MAX_VOLUME);
-  }
+#if defined(TARGET_ALLEGRO)
+  mixer[channel].voice = allocate_voice((SAMPLE *)mixer[channel].data_ptr);
+  if (mixer[channel].voice < 0)
+    return FALSE;
 #endif
+
+  return TRUE;
 }
 
-static void Mixer_StopChannel(int channel)
+static void Mixer_SetChannelProperties(int channel)
 {
-  if (!mixer_active_channels || !mixer[channel].active)
+#if defined(TARGET_SDL)
+  Mix_Volume(channel, mixer[channel].volume);
+  Mix_SetPanning(channel,
+                SOUND_VOLUME_LEFT(mixer[channel].stereo_position),
+                SOUND_VOLUME_RIGHT(mixer[channel].stereo_position));
+#elif defined(TARGET_ALLEGRO)
+  voice_set_volume(mixer[channel].voice, mixer[channel].volume);
+  voice_set_pan(mixer[channel].voice, mixer[channel].stereo_position);
+#endif
+}
+
+static void Mixer_StartChannel(int channel)
+{
+#if defined(TARGET_SDL)
+  Mix_PlayChannel(channel, mixer[channel].data_ptr,
+                 IS_LOOP(mixer[channel]) ? -1 : 0);
+#elif defined(TARGET_ALLEGRO)
+  if (IS_LOOP(mixer[channel]))
+    voice_set_playmode(mixer[channel].voice, PLAYMODE_LOOP);
+
+  voice_start(mixer[channel].voice);       
+#endif
+}
+
+static void Mixer_PlayChannel(int channel)
+{
+  /* start with inactive channel in case something goes wrong */
+  mixer[channel].active = FALSE;
+
+  if (mixer[channel].type != MUS_TYPE_WAV)
+    return;
+
+  if (!Mixer_AllocateChannel(channel))
+    return;
+
+  Mixer_SetChannelProperties(channel);
+  Mixer_StartChannel(channel);
+
+  Mixer_ResetChannelExpiration(channel);
+
+  mixer[channel].playing_pos = 0;
+  mixer[channel].active = TRUE;
+  mixer_active_channels++;
+}
+
+static void Mixer_PlayMusicChannel()
+{
+  Mixer_PlayChannel(audio.music_channel);
+
+#if defined(TARGET_SDL)
+  if (mixer[audio.music_channel].type != MUS_TYPE_WAV)
+  {
+    /* Mix_VolumeMusic() must be called _after_ Mix_PlayMusic() --
+       this looks like a bug in the SDL_mixer library */
+    Mix_PlayMusic(mixer[audio.music_channel].data_ptr, -1);
+    Mix_VolumeMusic(mixer[audio.music_channel].volume);
+  }
+#endif
+}
+
+static void Mixer_StopChannel(int channel)
+{
+  if (!mixer[channel].active)
     return;
 
 #if defined(TARGET_SDL)
   Mix_HaltChannel(channel);
-#elif defined(PLATFORM_MSDOS)
+#elif defined(TARGET_ALLEGRO)
   voice_set_volume(mixer[channel].voice, 0);
   deallocate_voice(mixer[channel].voice);
 #endif
@@ -386,14 +768,16 @@ static void Mixer_StopMusicChannel()
 
 static void Mixer_FadeChannel(int channel)
 {
+  if (!mixer[channel].active)
+    return;
+
   mixer[channel].state |= SND_CTRL_FADE;
 
 #if defined(TARGET_SDL)
   Mix_FadeOutChannel(channel, SOUND_FADING_INTERVAL);
-#elif defined(PLATFORM_MSDOS)
+#elif defined(TARGET_ALLEGRO)
   if (voice_check(mixer[channel].voice))
     voice_ramp_volume(mixer[channel].voice, SOUND_FADING_INTERVAL, 0);
-  mixer[channel].state &= ~SND_CTRL_IS_LOOP;
 #endif
 }
 
@@ -406,71 +790,121 @@ static void Mixer_FadeMusicChannel()
 #endif
 }
 
+static void Mixer_UnFadeChannel(int channel)
+{
+  if (!mixer[channel].active || !IS_FADING(mixer[channel]))
+    return;
+
+  mixer[channel].state &= ~SND_CTRL_FADE;
+  mixer[channel].volume = SOUND_MAX_VOLUME;
+
+#if defined(TARGET_SDL)
+  Mix_ExpireChannel(channel, -1);
+  Mix_Volume(channel, mixer[channel].volume);
+#elif defined(TARGET_ALLEGRO)
+  voice_stop_volumeramp(mixer[channel].voice);
+  voice_ramp_volume(mixer[channel].voice, SOUND_FADING_INTERVAL,
+                   mixer[channel].volume);
+#endif
+}
+
 static void Mixer_InsertSound(SoundControl snd_ctrl)
 {
   SoundInfo *snd_info;
   int i, k;
-
-#if 0
-  printf("NEW SOUND %d HAS ARRIVED [%d]\n", snd_ctrl.nr, num_sounds);
-#endif
+  int num_sounds = getSoundListSize();
+  int num_music  = getMusicListSize();
 
   if (IS_MUSIC(snd_ctrl))
-    snd_ctrl.nr = snd_ctrl.nr % num_music;
-  else if (snd_ctrl.nr >= num_sounds)
-    return;
+  {
+    if (snd_ctrl.nr >= num_music)      /* invalid music */
+      return;
+
+    if (snd_ctrl.nr < 0)               /* undefined music */
+    {
+      if (num_music_noconf == 0)       /* no fallback music available */
+       return;
+
+      snd_ctrl.nr = UNMAP_NOCONF_MUSIC(snd_ctrl.nr) % num_music_noconf;
+      snd_info = Music_NoConf[snd_ctrl.nr];
+    }
+    else
+      snd_info = getMusicInfoEntryFromMusicID(snd_ctrl.nr);
+  }
+  else
+  {
+    if (snd_ctrl.nr < 0 || snd_ctrl.nr >= num_sounds)
+      return;
+
+    snd_info = getSoundInfoEntryFromSoundID(snd_ctrl.nr);
+  }
 
-  snd_info = (IS_MUSIC(snd_ctrl) ? Music[snd_ctrl.nr] : Sound[snd_ctrl.nr]);
   if (snd_info == NULL)
     return;
 
   /* copy sound sample and format information */
-  snd_ctrl.data_ptr = snd_info->data_ptr;
-  snd_ctrl.data_len = snd_info->data_len;
-  snd_ctrl.format   = snd_info->format;
+  snd_ctrl.type         = snd_info->type;
+  snd_ctrl.format       = snd_info->format;
+  snd_ctrl.data_ptr     = snd_info->data_ptr;
+  snd_ctrl.data_len     = snd_info->data_len;
+  snd_ctrl.num_channels = snd_info->num_channels;
 
+  /* play music samples on a dedicated music channel */
   if (IS_MUSIC(snd_ctrl))
   {
-    mixer[audio.music_channel] = snd_ctrl;
+    Mixer_StopMusicChannel();
 
-    Mixer_PlayChannel(audio.music_channel);
+    mixer[audio.music_channel] = snd_ctrl;
+    Mixer_PlayMusicChannel();
 
     return;
   }
 
-#if 0
-  printf("-> %d\n", mixer_active_channels);
-#endif
+  /* check if (and how often) this sound sample is already playing */
+  for (k = 0, i = audio.first_sound_channel; i < audio.num_channels; i++)
+    if (mixer[i].active && SAME_SOUND_DATA(mixer[i], snd_ctrl))
+      k++;
 
-  if (mixer_active_channels == audio.num_channels)
+  /* reset expiration delay for already playing loop sounds */
+  if (k > 0 && IS_LOOP(snd_ctrl))
   {
-    for (i=0; i<audio.num_channels; i++)
+    for (i = audio.first_sound_channel; i < audio.num_channels; i++)
     {
-      if (mixer[i].data_ptr == NULL)
+      if (mixer[i].active && SAME_SOUND_DATA(mixer[i], snd_ctrl))
       {
-#if 1
-       printf("THIS SHOULD NEVER HAPPEN! [%d]\n", i);
-#endif
+       if (IS_FADING(mixer[i]))
+         Mixer_UnFadeChannel(i);
 
-       Mixer_StopChannel(i);
+       /* restore settings like volume and stereo position */
+       mixer[i].volume = snd_ctrl.volume;
+       mixer[i].stereo_position = snd_ctrl.stereo_position;
+
+       Mixer_SetChannelProperties(i);
+       Mixer_ResetChannelExpiration(i);
       }
     }
+
+    return;
   }
 
-  /* if mixer is full, remove oldest sound */
-  if (mixer_active_channels == audio.num_channels)
+  /* don't play sound more than n times simultaneously (with n == 2 for now) */
+  if (k >= 2)
   {
+    unsigned int playing_current = Counter();
     int longest = 0, longest_nr = audio.first_sound_channel;
 
-    for (i=audio.first_sound_channel; i<audio.num_channels; i++)
+    /* look for oldest equal sound */
+    for (i = audio.first_sound_channel; i < audio.num_channels; i++)
     {
-#if !defined(PLATFORM_MSDOS)
-      int actual = 100 * mixer[i].playingpos / mixer[i].data_len;
-#else
-      int actual = mixer[i].playingpos;
-#endif
+      int playing_time = playing_current - mixer[i].playing_starttime;
+      int actual;
 
-      if (!IS_LOOP(mixer[i]) && actual > longest)
+      if (!mixer[i].active || !SAME_SOUND_NR(mixer[i], snd_ctrl))
+       continue;
+
+      actual = 1000 * playing_time / mixer[i].data_len;
+
+      if (actual >= longest)
       {
        longest = actual;
        longest_nr = i;
@@ -480,50 +914,53 @@ static void Mixer_InsertSound(SoundControl snd_ctrl)
     Mixer_StopChannel(longest_nr);
   }
 
-  /* check if sound is already being played (and how often) */
-  for (k=0, i=audio.first_sound_channel; i<audio.num_channels; i++)
-    if (mixer[i].nr == snd_ctrl.nr)
-      k++;
+  /* If all (non-music) channels are active, stop the channel that has
+     played its sound sample most completely (in percent of the sample
+     length). As we cannot currently get the actual playing position
+     of the channel's sound sample when compiling with the SDL mixer
+     library, we use the current playing time (in milliseconds) instead. */
 
-  /* restart loop sounds only if they are just fading out */
-  if (k >= 1 && IS_LOOP(snd_ctrl))
+#if DEBUG
+  /* channel allocation sanity check -- should not be needed */
+  if (mixer_active_channels ==
+      audio.num_channels - (mixer[audio.music_channel].active ? 0 : 1))
   {
-    for(i=audio.first_sound_channel; i<audio.num_channels; i++)
+    for (i = audio.first_sound_channel; i < audio.num_channels; i++)
     {
-      if (mixer[i].nr == snd_ctrl.nr && IS_FADING(mixer[i]))
+      if (!mixer[i].active)
       {
-       mixer[i].state &= ~SND_CTRL_FADE;
-       mixer[i].volume = PSND_MAX_VOLUME;
-#if defined(PLATFORM_MSDOS)
-        mixer[i].state |= SND_CTRL_LOOP;
-        voice_stop_volumeramp(mixer[i].voice);
-        voice_ramp_volume(mixer[i].voice, mixer[i].volume, 1000);
-#endif
+       Error(ERR_INFO, "Mixer_InsertSound: Channel %d inactive", i);
+       Error(ERR_INFO, "Mixer_InsertSound: This should never happen!");
+
+       mixer_active_channels--;
       }
     }
-
-    return;
   }
+#endif
 
-  /* don't play sound more than n times simultaneously (with n == 2 for now) */
-  if (k >= 2)
+  if (mixer_active_channels ==
+      audio.num_channels - (mixer[audio.music_channel].active ? 0 : 1))
   {
+    unsigned int playing_current = Counter();
     int longest = 0, longest_nr = audio.first_sound_channel;
 
-    /* look for oldest equal sound */
-    for(i=audio.first_sound_channel; i<audio.num_channels; i++)
+#if 0
+#if DEBUG
+    /* print some debugging information about audio channel usage */
+    for (i = audio.first_sound_channel; i < audio.num_channels; i++)
     {
-      int actual;
+      Error(ERR_INFO, "Mixer_InsertSound: %d [%d]: %d (%d)",
+           i, mixer[i].active, mixer[i].data_len, (int)mixer[i].data_ptr);
+    }
+#endif
+#endif
 
-      if (!mixer[i].active || mixer[i].nr != snd_ctrl.nr)
-       continue;
+    for (i = audio.first_sound_channel; i < audio.num_channels; i++)
+    {
+      int playing_time = playing_current - mixer[i].playing_starttime;
+      int actual = 1000 * playing_time / mixer[i].data_len;
 
-#if !defined(PLATFORM_MSDOS)
-      actual = 100 * mixer[i].playingpos / mixer[i].data_len;
-#else
-      actual = mixer[i].playingpos;
-#endif
-      if (actual >= longest)
+      if (!IS_LOOP(mixer[i]) && actual > longest)
       {
        longest = actual;
        longest_nr = i;
@@ -533,50 +970,19 @@ static void Mixer_InsertSound(SoundControl snd_ctrl)
     Mixer_StopChannel(longest_nr);
   }
 
-  /* add new sound to mixer */
-  for(i=0; i<audio.num_channels; i++)
+  /* add the new sound to the mixer */
+  for (i = audio.first_sound_channel; i < audio.num_channels; i++)
   {
-#if 0
-    printf("CHECKING CHANNEL %d FOR SOUND %d ...\n", i, snd_ctrl.nr);
-#endif
-
-    /*
-    if (!mixer[i].active ||
-       (IS_MUSIC(snd_ctrl) && i == audio.music_channel))
-    */
-    if ((i == audio.music_channel && IS_MUSIC(snd_ctrl)) ||
-       (i != audio.music_channel && !mixer[i].active))
+    if (!mixer[i].active)
     {
-#if 0
-      printf("ADDING NEW SOUND %d TO MIXER\n", snd_ctrl.nr);
-#endif
-
-#if 1
+#if defined(AUDIO_UNIX_NATIVE)
       if (snd_info->data_len == 0)
       {
        printf("THIS SHOULD NEVER HAPPEN! [snd_info->data_len == 0]\n");
       }
 #endif
 
-#if 1
-      if (IS_MUSIC(snd_ctrl) && i == audio.music_channel && mixer[i].active)
-      {
-       printf("THIS SHOULD NEVER HAPPEN! [adding music twice]\n");
-
-#if 1
-       Mixer_StopChannel(i);
-#endif
-      }
-#endif
-
-#if 0
-      snd_ctrl.data_ptr = snd_info->data_ptr;
-      snd_ctrl.data_len = snd_info->data_len;
-      snd_ctrl.format   = snd_info->format;
-#endif
-
       mixer[i] = snd_ctrl;
-
       Mixer_PlayChannel(i);
 
       break;
@@ -589,30 +995,28 @@ static void HandleSoundRequest(SoundControl snd_ctrl)
   int i;
 
 #if defined(AUDIO_UNIX_NATIVE)
-  if (IS_PARENT_PROCESS(audio.mixer_pid))
+  if (IS_PARENT_PROCESS())
   {
     SendSoundControlToMixerProcess(&snd_ctrl);
     return;
   }
-#elif defined(TARGET_ALLEGRO)
-  for (i=0; i<audio.num_channels; i++)
-  {
-    if (!mixer[i].active || IS_LOOP(mixer[i]))
-      continue;
-
-    mixer[i].playingpos = voice_get_position(mixer[i].voice);
-    mixer[i].volume = voice_get_volume(mixer[i].voice);
+#endif
 
-    if (mixer[i].playingpos == -1 || mixer[i].volume == 0)
+  /* deactivate channels that have expired since the last request */
+  for (i = 0; i < audio.num_channels; i++)
+    if (mixer[i].active && Mixer_ChannelExpired(i))
       Mixer_StopChannel(i);
-  }
-#endif /* TARGET_ALLEGRO */
 
   if (IS_RELOADING(snd_ctrl))          /* load new sound or music files */
   {
-    ReadReloadInfoFromPipe(&snd_ctrl);
-    Mixer_InitChannels();
+    Mixer_StopMusicChannel();
+    for (i = audio.first_sound_channel; i < audio.num_channels; i++)
+      Mixer_StopChannel(i);
+
+#if defined(AUDIO_UNIX_NATIVE)
     CloseAudioDevice(&audio.device_fd);
+    ReadReloadInfoFromPipe(&snd_ctrl);
+#endif
 
     if (snd_ctrl.state & SND_CTRL_RELOAD_SOUNDS)
       ReloadCustomSounds();
@@ -621,36 +1025,32 @@ static void HandleSoundRequest(SoundControl snd_ctrl)
   }
   else if (IS_FADING(snd_ctrl))                /* fade out existing sound or music */
   {
-    if (!mixer_active_channels)
-      return;
-
     if (IS_MUSIC(snd_ctrl))
     {
-      Mixer_FadeChannel(audio.music_channel);
+      Mixer_FadeMusicChannel();
       return;
     }
 
-    for(i=audio.first_sound_channel; i<audio.num_channels; i++)
-      if (mixer[i].nr == snd_ctrl.nr || ALL_SOUNDS(snd_ctrl))
+    for (i = audio.first_sound_channel; i < audio.num_channels; i++)
+      if (SAME_SOUND_NR(mixer[i], snd_ctrl) || ALL_SOUNDS(snd_ctrl))
        Mixer_FadeChannel(i);
   }
   else if (IS_STOPPING(snd_ctrl))      /* stop existing sound or music */
   {
-    if (!mixer_active_channels)
-      return;
-
     if (IS_MUSIC(snd_ctrl))
     {
-      Mixer_StopChannel(audio.music_channel);
+      Mixer_StopMusicChannel();
       return;
     }
 
-    for(i=audio.first_sound_channel; i<audio.num_channels; i++)
-      if (mixer[i].nr == snd_ctrl.nr || ALL_SOUNDS(snd_ctrl))
+    for (i = audio.first_sound_channel; i < audio.num_channels; i++)
+      if (SAME_SOUND_NR(mixer[i], snd_ctrl) || ALL_SOUNDS(snd_ctrl))
        Mixer_StopChannel(i);
 
+#if defined(AUDIO_UNIX_NATIVE)
     if (!mixer_active_channels)
       CloseAudioDevice(&audio.device_fd);
+#endif
   }
   else if (snd_ctrl.active)            /* add new sound to mixer */
   {
@@ -660,59 +1060,91 @@ static void HandleSoundRequest(SoundControl snd_ctrl)
 
 void StartMixer(void)
 {
+  int i;
+
+#if 0
+  SDL_version compile_version;
+  const SDL_version *link_version;
+  MIX_VERSION(&compile_version);
+  printf("compiled with SDL_mixer version: %d.%d.%d\n", 
+        compile_version.major,
+        compile_version.minor,
+        compile_version.patch);
+  link_version = Mix_Linked_Version();
+  printf("running with SDL_mixer version: %d.%d.%d\n", 
+        link_version->major,
+        link_version->minor,
+        link_version->patch);
+#endif
+
   if (!audio.sound_available)
     return;
 
-#if defined(PLATFORM_UNIX) && !defined(TARGET_SDL)
+  /* initialize stereo position conversion information */
+  for (i = 0; i <= SOUND_MAX_LEFT2RIGHT; i++)
+    stereo_volume[i] =
+      (int)sqrt((float)(SOUND_MAX_LEFT2RIGHT * SOUND_MAX_LEFT2RIGHT - i * i));
+
+#if defined(AUDIO_UNIX_NATIVE)
   if (!ForkAudioProcess())
     audio.sound_available = FALSE;
 #endif
 }
 
-#if defined(PLATFORM_UNIX) && !defined(TARGET_SDL)
+#if defined(AUDIO_UNIX_NATIVE)
 
 static void CopySampleToMixingBuffer(SoundControl *snd_ctrl,
                                     int sample_pos, int sample_size,
-                                    short *buffer_ptr)
+                                    short *buffer_base_ptr, int buffer_pos,
+                                    int num_output_channels)
 {
-  void *sample_ptr = snd_ctrl->data_ptr;
-  int i;
+  short *buffer_ptr = buffer_base_ptr + num_output_channels * buffer_pos;
+  int num_channels = snd_ctrl->num_channels;
+  int stepsize = num_channels;
+  int output_stepsize = num_output_channels;
+  int i, j;
 
   if (snd_ctrl->format == AUDIO_FORMAT_U8)
-    for (i=0; i<sample_size; i++)
-      *buffer_ptr++ =
-       ((short)(((byte *)sample_ptr)[sample_pos + i] ^ 0x80)) << 8;
+  {
+    byte *sample_ptr = (byte *)snd_ctrl->data_ptr + num_channels * sample_pos;
+
+    for (i = 0; i < num_output_channels; i++)
+    {
+      int offset = (snd_ctrl->num_channels == 1 ? 0 : i);
+
+      for (j = 0; j < sample_size; j++)
+       buffer_ptr[output_stepsize * j + i] =
+         ((short)(sample_ptr[stepsize * j + offset] ^ 0x80)) << 8;
+    }
+  }
   else /* AUDIO_FORMAT_S16 */
-    for (i=0; i<sample_size; i++)
-      *buffer_ptr++ =
-       ((short *)sample_ptr)[sample_pos + i];
+  {
+    short *sample_ptr= (short *)snd_ctrl->data_ptr + num_channels * sample_pos;
+
+    for (i = 0; i < num_output_channels; i++)
+    {
+      int offset = (snd_ctrl->num_channels == 1 ? 0 : i);
+
+      for (j = 0; j < sample_size; j++)
+       buffer_ptr[output_stepsize * j + i] =
+         sample_ptr[stepsize * j + offset];
+    }
+  }
 }
 
 #if defined(AUDIO_STREAMING_DSP)
 static void Mixer_Main_DSP()
 {
-  static int stereo_volume[PSND_MAX_LEFT2RIGHT + 1];
-  static boolean stereo_volume_calculated = FALSE;
-  static short premix_first_buffer[SND_BLOCKSIZE];
-  static short premix_left_buffer[SND_BLOCKSIZE];
-  static short premix_right_buffer[SND_BLOCKSIZE];
-  static long premix_last_buffer[SND_BLOCKSIZE];
-  static byte playing_buffer[SND_BLOCKSIZE];
+  static short premix_first_buffer[DEFAULT_AUDIO_FRAGMENT_SIZE];
+  static int premix_last_buffer[DEFAULT_AUDIO_FRAGMENT_SIZE];
+  static byte playing_buffer[DEFAULT_AUDIO_FRAGMENT_SIZE];
   boolean stereo;
   int fragment_size;
   int sample_bytes;
   int max_sample_size;
+  int num_output_channels;
   int i, j;
 
-  if (!stereo_volume_calculated)
-  {
-    for(i=0; i<=PSND_MAX_LEFT2RIGHT; i++)
-      stereo_volume[i] =
-       (int)sqrt((float)(PSND_MAX_LEFT2RIGHT * PSND_MAX_LEFT2RIGHT - i * i));
-
-    stereo_volume_calculated = TRUE;
-  }
-
   if (!mixer_active_channels)
     return;
 
@@ -727,15 +1159,16 @@ static void Mixer_Main_DSP()
   stereo = afmt.stereo;
   fragment_size = afmt.fragment_size;
   sample_bytes = (afmt.format & AUDIO_FORMAT_U8 ? 1 : 2);
-  max_sample_size = fragment_size / ((stereo ? 2 : 1) * sample_bytes);
+  num_output_channels = (stereo ? 2 : 1);
+  max_sample_size = fragment_size / (num_output_channels * sample_bytes);
 
   /* first clear the last premixing buffer */
-  memset(premix_last_buffer, 0,
-        max_sample_size * (stereo ? 2 : 1) * sizeof(long));
+  clear_mem(premix_last_buffer,
+           max_sample_size * num_output_channels * sizeof(int));
 
-  for(i=0; i<audio.num_channels; i++)
+  for (i = 0; i < audio.num_channels; i++)
   {
-    void *sample_ptr;
+    // void *sample_ptr;
     int sample_len;
     int sample_pos;
     int sample_size;
@@ -743,16 +1176,22 @@ static void Mixer_Main_DSP()
     if (!mixer[i].active)
       continue;
 
+    if (Mixer_ChannelExpired(i))
+    {
+      Mixer_StopChannel(i);
+      continue;
+    }
+
     /* pointer, lenght and actual playing position of sound sample */
-    sample_ptr = mixer[i].data_ptr;
+    // sample_ptr = mixer[i].data_ptr;
     sample_len = mixer[i].data_len;
-    sample_pos = mixer[i].playingpos;
+    sample_pos = mixer[i].playing_pos;
     sample_size = MIN(max_sample_size, sample_len - sample_pos);
-    mixer[i].playingpos += sample_size;
+    mixer[i].playing_pos += sample_size;
 
     /* copy original sample to first mixing buffer */
     CopySampleToMixingBuffer(&mixer[i], sample_pos, sample_size,
-                            premix_first_buffer);
+                            premix_first_buffer, 0, num_output_channels);
 
     /* are we about to restart a looping sound? */
     if (IS_LOOP(mixer[i]) && sample_size < max_sample_size)
@@ -762,16 +1201,11 @@ static void Mixer_Main_DSP()
        int restarted_sample_size =
          MIN(max_sample_size - sample_size, sample_len);
 
-       if (mixer[i].format == AUDIO_FORMAT_U8)
-         for (j=0; j<restarted_sample_size; j++)
-           premix_first_buffer[sample_size + j] =
-             ((short)(((byte *)sample_ptr)[j] ^ 0x80)) << 8;
-       else
-         for (j=0; j<restarted_sample_size; j++)
-           premix_first_buffer[sample_size + j] =
-             ((short *)sample_ptr)[j];
+       CopySampleToMixingBuffer(&mixer[i], 0, restarted_sample_size,
+                                premix_first_buffer, sample_size,
+                                num_output_channels);
 
-       mixer[i].playingpos = restarted_sample_size;
+       mixer[i].playing_pos = restarted_sample_size;
        sample_size += restarted_sample_size;
       }
     }
@@ -782,43 +1216,35 @@ static void Mixer_Main_DSP()
       mixer[i].volume -= SOUND_FADING_VOLUME_STEP;
 
     /* adjust volume of actual sound sample */
-    if (mixer[i].volume != PSND_MAX_VOLUME)
-      for(j=0; j<sample_size; j++)
+    if (mixer[i].volume != SOUND_MAX_VOLUME)
+      for (j = 0; j < sample_size * num_output_channels; j++)
        premix_first_buffer[j] =
-         (mixer[i].volume * (long)premix_first_buffer[j])
-           >> PSND_MAX_VOLUME_BITS;
+         mixer[i].volume * (int)premix_first_buffer[j] / SOUND_MAX_VOLUME;
 
-    /* fill the last mixing buffer with stereo or mono sound */
+    /* adjust left and right channel volume due to stereo sound position */
     if (stereo)
     {
-      int middle_pos = PSND_MAX_LEFT2RIGHT / 2;
-      int left_volume = stereo_volume[middle_pos + mixer[i].stereo];
-      int right_volume= stereo_volume[middle_pos - mixer[i].stereo];
+      int left_volume  = SOUND_VOLUME_LEFT(mixer[i].stereo_position);
+      int right_volume = SOUND_VOLUME_RIGHT(mixer[i].stereo_position);
 
-      for(j=0; j<sample_size; j++)
+      for (j = 0; j < sample_size; j++)
       {
-       premix_left_buffer[j] =
-         (left_volume * premix_first_buffer[j])
-           >> PSND_MAX_LEFT2RIGHT_BITS;
-       premix_right_buffer[j] =
-         (right_volume * premix_first_buffer[j])
-           >> PSND_MAX_LEFT2RIGHT_BITS;
-
-       premix_last_buffer[2 * j + 0] += premix_left_buffer[j];
-       premix_last_buffer[2 * j + 1] += premix_right_buffer[j];
+       premix_first_buffer[2 * j + 0] =
+         left_volume  * premix_first_buffer[2 * j + 0] / SOUND_MAX_LEFT2RIGHT;
+       premix_first_buffer[2 * j + 1] =
+         right_volume * premix_first_buffer[2 * j + 1] / SOUND_MAX_LEFT2RIGHT;
       }
     }
-    else
-    {
-      for(j=0; j<sample_size; j++)
-       premix_last_buffer[j] += premix_first_buffer[j];
-    }
+
+    /* fill the last mixing buffer with stereo or mono sound */
+    for (j = 0; j < sample_size * num_output_channels; j++)
+      premix_last_buffer[j] += premix_first_buffer[j];
 
     /* delete completed sound entries from the mixer */
-    if (mixer[i].playingpos >= mixer[i].data_len)
+    if (mixer[i].playing_pos >= mixer[i].data_len)
     {
       if (IS_LOOP(mixer[i]))
-       mixer[i].playingpos = 0;
+       mixer[i].playing_pos = 0;
       else
        Mixer_StopChannel(i);
     }
@@ -827,7 +1253,7 @@ static void Mixer_Main_DSP()
   }
 
   /* prepare final playing buffer according to system audio format */
-  for(i=0; i<max_sample_size * (stereo ? 2 : 1); i++)
+  for (i = 0; i < max_sample_size * num_output_channels; i++)
   {
     /* cut off at 17 bit value */
     if (premix_last_buffer[i] < -65535)
@@ -855,7 +1281,8 @@ static void Mixer_Main_DSP()
   }
 
   /* finally play the sound fragment */
-  write(audio.device_fd, playing_buffer, fragment_size);
+  if (write(audio.device_fd, playing_buffer, fragment_size) == -1)
+    Error(ERR_WARN, "write() failed; %s", strerror(errno));
 
   if (!mixer_active_channels)
     CloseAudioDevice(&audio.device_fd);
@@ -865,9 +1292,10 @@ static void Mixer_Main_DSP()
 
 static int Mixer_Main_SimpleAudio(SoundControl snd_ctrl)
 {
-  static short premix_first_buffer[SND_BLOCKSIZE];
-  static byte playing_buffer[SND_BLOCKSIZE];
-  int max_sample_size = SND_BLOCKSIZE;
+  static short premix_first_buffer[DEFAULT_AUDIO_FRAGMENT_SIZE];
+  static byte playing_buffer[DEFAULT_AUDIO_FRAGMENT_SIZE];
+  int max_sample_size = DEFAULT_AUDIO_FRAGMENT_SIZE;
+  int num_output_channels = 1;
   void *sample_ptr;
   int sample_len;
   int sample_pos;
@@ -879,33 +1307,30 @@ static int Mixer_Main_SimpleAudio(SoundControl snd_ctrl)
   /* pointer, lenght and actual playing position of sound sample */
   sample_ptr = mixer[i].data_ptr;
   sample_len = mixer[i].data_len;
-  sample_pos = mixer[i].playingpos;
+  sample_pos = mixer[i].playing_pos;
   sample_size = MIN(max_sample_size, sample_len - sample_pos);
-  mixer[i].playingpos += sample_size;
+  mixer[i].playing_pos += sample_size;
 
   /* copy original sample to first mixing buffer */
   CopySampleToMixingBuffer(&mixer[i], sample_pos, sample_size,
-                          premix_first_buffer);
+                          premix_first_buffer, 0, num_output_channels);
 
   /* adjust volume of actual sound sample */
-  if (mixer[i].volume != PSND_MAX_VOLUME)
-    for(j=0; j<sample_size; j++)
+  if (mixer[i].volume != SOUND_MAX_VOLUME)
+    for (j = 0; j < sample_size; j++)
       premix_first_buffer[j] =
-       (mixer[i].volume * (long)premix_first_buffer[j])
-         >> PSND_MAX_VOLUME_BITS;
+       mixer[i].volume * (int)premix_first_buffer[j] / SOUND_MAX_VOLUME;
 
   /* might be needed for u-law /dev/audio */
-#if 0
-  for(j=0; j<sample_size; j++)
+  for (j = 0; j < sample_size; j++)
     playing_buffer[j] =
       linear_to_ulaw(premix_first_buffer[j]);
-#endif
 
   /* delete completed sound entries from the mixer */
-  if (mixer[i].playingpos >= mixer[i].data_len)
+  if (mixer[i].playing_pos >= mixer[i].data_len)
     Mixer_StopChannel(i);
 
-  for(i=0; i<sample_size; i++)
+  for (i = 0; i < sample_size; i++)
     playing_buffer[i] = (premix_first_buffer[i] >> 8) ^ 0x80;
 
   /* finally play the sound fragment */
@@ -931,7 +1356,7 @@ void Mixer_Main()
   FD_ZERO(&mixer_fdset); 
   FD_SET(audio.mixer_pipe[0], &mixer_fdset);
 
-  while(1)     /* wait for sound playing commands from client */
+  while (1)    /* wait for sound playing commands from client */
   {
     struct timeval delay = { 0, 0 };
 
@@ -989,194 +1414,37 @@ void Mixer_Main()
 #endif /* !AUDIO_STREAMING_DSP */
   }
 }
-#endif /* PLATFORM_UNIX */
+#endif /* AUDIO_UNIX_NATIVE */
 
 
-/* ------------------------------------------------------------------------- */
-/* platform dependant audio initialization code                              */
-/* ------------------------------------------------------------------------- */
+#if defined(AUDIO_UNIX_NATIVE) && !defined(AUDIO_STREAMING_DSP)
 
-#if defined(AUDIO_LINUX_IOCTL)
-static void InitAudioDevice_Linux(struct AudioFormatInfo *afmt)
-{
-  /* "ioctl()" expects pointer to 'int' value for stereo flag
-     (boolean is defined as 'char', which will not work here) */
-  unsigned int fragment_spec = 0;
-  int fragment_size_query;
-  int stereo = TRUE;
-  struct
-  {
-    int format_ioctl;
-    int format_result;
-  }
-  formats[] =
-  {
-    /* supported audio format in preferred order */
-    { AFMT_S16_LE,     AUDIO_FORMAT_S16 | AUDIO_FORMAT_LE },
-    { AFMT_S16_BE,     AUDIO_FORMAT_S16 | AUDIO_FORMAT_BE },
-    { AFMT_U8,         AUDIO_FORMAT_U8                    },
-    { -1,              -1 }
-  };
-  int i;
+/* these two are stolen from "sox"... :) */
 
-  /* determine logarithm (log2) of the fragment size */
-  while ((1 << fragment_spec) < afmt->fragment_size)
-    fragment_spec++;
+/*
+** This routine converts from linear to ulaw.
+**
+** Craig Reese: IDA/Supercomputing Research Center
+** Joe Campbell: Department of Defense
+** 29 September 1989
+**
+** References:
+** 1) CCITT Recommendation G.711  (very difficult to follow)
+** 2) "A New Digital Technique for Implementation of Any
+**     Continuous PCM Companding Law," Villeret, Michel,
+**     et al. 1973 IEEE Int. Conf. on Communications, Vol 1,
+**     1973, pg. 11.12-11.17
+** 3) MIL-STD-188-113,"Interoperability and Performance Standards
+**     for Analog-to_Digital Conversion Techniques,"
+**     17 February 1987
+**
+** Input: Signed 16 bit linear sample
+** Output: 8 bit ulaw sample
+*/
 
-  /* use two fragments (play one fragment, prepare the other);
-     one fragment would result in interrupted audio output, more
-     than two fragments would raise audio output latency to much */
-  fragment_spec |= 0x00020000;
-
-  /* Example for fragment specification:
-     - 2 buffers / 512 bytes (giving 1/16 second resolution for 8 kHz)
-     - (with stereo the effective buffer size will shrink to 256)
-     => fragment_size = 0x00020009 */
-
-  if (ioctl(audio.device_fd, SNDCTL_DSP_SETFRAGMENT, &fragment_spec) < 0)
-    Error(ERR_EXIT_SOUND_SERVER,
-         "cannot set fragment size of /dev/dsp -- no sounds");
-
-  i = 0;
-  afmt->format = 0;
-  while (formats[i].format_result != -1)
-  {
-    unsigned int audio_format = formats[i].format_ioctl;
-    if (ioctl(audio.device_fd, SNDCTL_DSP_SETFMT, &audio_format) == 0)
-    {
-      afmt->format = formats[i].format_result;
-      break;
-    }
-  }
-
-  if (afmt->format == 0)       /* no supported audio format found */
-    Error(ERR_EXIT_SOUND_SERVER,
-         "cannot set audio format of /dev/dsp -- no sounds");
-
-  /* try if we can use stereo sound */
-  afmt->stereo = TRUE;
-  if (ioctl(audio.device_fd, SNDCTL_DSP_STEREO, &stereo) < 0)
-    afmt->stereo = FALSE;
-
-  if (ioctl(audio.device_fd, SNDCTL_DSP_SPEED, &afmt->sample_rate) < 0)
-    Error(ERR_EXIT_SOUND_SERVER,
-         "cannot set sample rate of /dev/dsp -- no sounds");
-
-  /* get the real fragmentation size; this should return 512 */
-  if (ioctl(audio.device_fd, SNDCTL_DSP_GETBLKSIZE, &fragment_size_query) < 0)
-    Error(ERR_EXIT_SOUND_SERVER,
-         "cannot get fragment size of /dev/dsp -- no sounds");
-  if (fragment_size_query != afmt->fragment_size)
-    Error(ERR_EXIT_SOUND_SERVER,
-         "cannot set fragment size of /dev/dsp -- no sounds");
-}
-#endif /* AUDIO_LINUX_IOCTL */
-
-#if defined(PLATFORM_NETBSD)
-static void InitAudioDevice_NetBSD(struct AudioFormatInfo *afmt)
-{
-  audio_info_t a_info;
-  boolean stereo = TRUE;
-
-  AUDIO_INITINFO(&a_info);
-  a_info.play.encoding = AUDIO_ENCODING_LINEAR8;
-  a_info.play.precision = 8;
-  a_info.play.channels = 2;
-  a_info.play.sample_rate = sample_rate;
-  a_info.blocksize = fragment_size;
-
-  afmt->format = AUDIO_FORMAT_U8;
-  afmt->stereo = TRUE;
-
-  if (ioctl(audio.device_fd, AUDIO_SETINFO, &a_info) < 0)
-  {
-    /* try to disable stereo */
-    a_info.play.channels = 1;
-
-    afmt->stereo = FALSE;
-
-    if (ioctl(audio.device_fd, AUDIO_SETINFO, &a_info) < 0)
-      Error(ERR_EXIT_SOUND_SERVER,
-           "cannot set sample rate of /dev/audio -- no sounds");
-  }
-}
-#endif /* PLATFORM_NETBSD */
-
-#if defined(PLATFORM_HPUX)
-static void InitAudioDevice_HPUX(struct AudioFormatInfo *afmt)
-{
-  struct audio_describe ainfo;
-  int audio_ctl;
-
-  audio_ctl = open("/dev/audioCtl", O_WRONLY | O_NDELAY);
-  if (audio_ctl == -1)
-    Error(ERR_EXIT_SOUND_SERVER, "cannot open /dev/audioCtl -- no sounds");
-
-  if (ioctl(audio_ctl, AUDIO_DESCRIBE, &ainfo) == -1)
-    Error(ERR_EXIT_SOUND_SERVER, "no audio info -- no sounds");
-
-  if (ioctl(audio_ctl, AUDIO_SET_DATA_FORMAT, AUDIO_FORMAT_ULAW) == -1)
-    Error(ERR_EXIT_SOUND_SERVER, "ulaw audio not available -- no sounds");
-
-  ioctl(audio_ctl, AUDIO_SET_CHANNELS, 1);
-  ioctl(audio_ctl, AUDIO_SET_SAMPLE_RATE, 8000);
-
-  afmt->format = AUDIO_FORMAT_U8;
-  afmt->stereo = FALSE;
-  afmt->sample_rate = 8000;
-
-  close(audio_ctl);
-}
-#endif /* PLATFORM_HPUX */
-
-#if defined(PLATFORM_UNIX)
-static void InitAudioDevice(struct AudioFormatInfo *afmt)
-{
-  afmt->stereo = TRUE;
-  afmt->format = AUDIO_FORMAT_UNKNOWN;
-  afmt->sample_rate = DEFAULT_AUDIO_SAMPLE_RATE;
-  afmt->fragment_size = DEFAULT_AUDIO_FRAGMENT_SIZE;
-
-#if defined(AUDIO_LINUX_IOCTL)
-  InitAudioDevice_Linux(afmt);
-#elif defined(PLATFORM_NETBSD)
-  InitAudioDevice_NetBSD(afmt);
-#elif defined(PLATFORM_HPUX)
-  InitAudioDevice_HPUX(afmt);
-#else
-  /* generic /dev/audio stuff might be placed here */
-#endif
-}
-#endif /* PLATFORM_UNIX */
-
-#if defined(PLATFORM_UNIX) && !defined(AUDIO_STREAMING_DSP)
-
-/* these two are stolen from "sox"... :) */
-
-/*
-** This routine converts from linear to ulaw.
-**
-** Craig Reese: IDA/Supercomputing Research Center
-** Joe Campbell: Department of Defense
-** 29 September 1989
-**
-** References:
-** 1) CCITT Recommendation G.711  (very difficult to follow)
-** 2) "A New Digital Technique for Implementation of Any
-**     Continuous PCM Companding Law," Villeret, Michel,
-**     et al. 1973 IEEE Int. Conf. on Communications, Vol 1,
-**     1973, pg. 11.12-11.17
-** 3) MIL-STD-188-113,"Interoperability and Performance Standards
-**     for Analog-to_Digital Conversion Techniques,"
-**     17 February 1987
-**
-** Input: Signed 16 bit linear sample
-** Output: 8 bit ulaw sample
-*/
-
-#define ZEROTRAP    /* turn on the trap as per the MIL-STD */
-#define BIAS 0x84   /* define the add-in bias for 16 bit samples */
-#define CLIP 32635
+#define ZEROTRAP    /* turn on the trap as per the MIL-STD */
+#define BIAS 0x84   /* define the add-in bias for 16 bit samples */
+#define CLIP 32635
 
 static unsigned char linear_to_ulaw(int sample)
 {
@@ -1254,7 +1522,7 @@ static int ulaw_to_linear(unsigned char ulawbyte)
 
   return(sample);
 }
-#endif /* PLATFORM_UNIX && !AUDIO_STREAMING_DSP */
+#endif /* AUDIO_UNIX_NATIVE && !AUDIO_STREAMING_DSP */
 
 
 /* THE STUFF ABOVE IS ONLY USED BY THE SOUND SERVER CHILD PROCESS            */
@@ -1264,24 +1532,24 @@ static int ulaw_to_linear(unsigned char ulawbyte)
 #define CHUNK_ID_LEN            4       /* IFF style chunk id length */
 #define WAV_HEADER_SIZE                16      /* size of WAV file header */
 
-static SoundInfo *Load_WAV(char *filename)
+static void *Load_WAV(char *filename)
 {
   SoundInfo *snd_info;
-#if !defined(TARGET_SDL) && !defined(PLATFORM_MSDOS)
+#if defined(AUDIO_UNIX_NATIVE)
+  struct SoundHeader_WAV header;
+#if 0
   byte sound_header_buffer[WAV_HEADER_SIZE];
+  int i;
+#endif
   char chunk_name[CHUNK_ID_LEN + 1];
   int chunk_size;
+  int data_byte_len;
   FILE *file;
-  int i;
 #endif
 
   if (!audio.sound_available)
     return NULL;
 
-#if 0
-  printf("loading WAV file '%s'\n", filename);
-#endif
-
   snd_info = checked_calloc(sizeof(SoundInfo));
 
 #if defined(TARGET_SDL)
@@ -1293,6 +1561,8 @@ static SoundInfo *Load_WAV(char *filename)
     return NULL;
   }
 
+  snd_info->data_len = ((Mix_Chunk *)snd_info->data_ptr)->alen;
+
 #elif defined(TARGET_ALLEGRO)
 
   if ((snd_info->data_ptr = load_sample(filename)) == NULL)
@@ -1302,7 +1572,11 @@ static SoundInfo *Load_WAV(char *filename)
     return NULL;
   }
 
-#else  /* PLATFORM_UNIX */
+  snd_info->data_len = ((SAMPLE *)snd_info->data_ptr)->len;
+
+#else /* AUDIO_UNIX_NATIVE */
+
+  clear_mem(&header, sizeof(struct SoundHeader_WAV));  /* to make gcc happy */
 
   if ((file = fopen(filename, MODE_READ)) == NULL)
   {
@@ -1312,8 +1586,8 @@ static SoundInfo *Load_WAV(char *filename)
   }
 
   /* read chunk id "RIFF" */
-  getFileChunk(file, chunk_name, &chunk_size, BYTE_ORDER_LITTLE_ENDIAN);
-  if (strcmp(chunk_name, "RIFF") != 0)
+  getFileChunkLE(file, chunk_name, &chunk_size);
+  if (!strEqual(chunk_name, "RIFF"))
   {
     Error(ERR_WARN, "missing 'RIFF' chunk of sound file '%s'", filename);
     fclose(file);
@@ -1322,8 +1596,8 @@ static SoundInfo *Load_WAV(char *filename)
   }
 
   /* read "RIFF" type id "WAVE" */
-  getFileChunk(file, chunk_name, NULL, BYTE_ORDER_LITTLE_ENDIAN);
-  if (strcmp(chunk_name, "WAVE") != 0)
+  getFileChunkLE(file, chunk_name, NULL);
+  if (!strEqual(chunk_name, "WAVE"))
   {
     Error(ERR_WARN, "missing 'WAVE' type ID of sound file '%s'", filename);
     fclose(file);
@@ -1331,20 +1605,77 @@ static SoundInfo *Load_WAV(char *filename)
     return NULL;
   }
 
-  while (getFileChunk(file, chunk_name, &chunk_size, BYTE_ORDER_LITTLE_ENDIAN))
+  while (getFileChunkLE(file, chunk_name, &chunk_size))
   {
-    if (strcmp(chunk_name, "fmt ") == 0)
+    if (strEqual(chunk_name, "fmt "))
     {
-      /* read header information */
-      for (i=0; i < MIN(chunk_size, WAV_HEADER_SIZE); i++)
-       sound_header_buffer[i] = fgetc(file);
+      if (chunk_size < WAV_HEADER_SIZE)
+      {
+       Error(ERR_WARN, "sound file '%s': chunk 'fmt ' too short", filename);
+       fclose(file);
+       free(snd_info);
+       return NULL;
+      }
+
+      header.compression_code = getFile16BitLE(file);
+      header.num_channels = getFile16BitLE(file);
+      header.sample_rate = getFile32BitLE(file);
+      header.bytes_per_second = getFile32BitLE(file);
+      header.block_align = getFile16BitLE(file);
+      header.bits_per_sample = getFile16BitLE(file);
 
       if (chunk_size > WAV_HEADER_SIZE)
        ReadUnusedBytesFromFile(file, chunk_size - WAV_HEADER_SIZE);
+
+      if (header.compression_code != 1)
+      {
+       Error(ERR_WARN, "sound file '%s': compression code %d not supported",
+             filename, header.compression_code);
+       fclose(file);
+       free(snd_info);
+       return NULL;
+      }
+
+      if (header.num_channels != 1 &&
+         header.num_channels != 2)
+      {
+       Error(ERR_WARN, "sound file '%s': number of %d channels not supported",
+             filename, header.num_channels);
+       fclose(file);
+       free(snd_info);
+       return NULL;
+      }
+
+      if (header.bits_per_sample != 8 &&
+         header.bits_per_sample != 16)
+      {
+       Error(ERR_WARN, "sound file '%s': %d bits per sample not supported",
+             filename, header.bits_per_sample);
+       fclose(file);
+       free(snd_info);
+       return NULL;
+      }
+
+      /* warn, but accept wrong sample rate (may be only slightly different) */
+      if (header.sample_rate != DEFAULT_AUDIO_SAMPLE_RATE)
+       Error(ERR_WARN, "sound file '%s': wrong sample rate %d instead of %d",
+             filename, header.sample_rate, DEFAULT_AUDIO_SAMPLE_RATE);
+
+#if 0
+      printf("WAV file: '%s'\n", filename);
+      printf("  Compression code: %d'\n", header.compression_code);
+      printf("  Number of channels: %d'\n", header.num_channels);
+      printf("  Sample rate: %d'\n", header.sample_rate);
+      printf("  Average bytes per second: %d'\n", header.bytes_per_second);
+      printf("  Block align: %d'\n", header.block_align);
+      printf("  Significant bits per sample: %d'\n", header.bits_per_sample);
+#endif
     }
-    else if (strcmp(chunk_name, "data") == 0)
+    else if (strEqual(chunk_name, "data"))
     {
-      snd_info->data_len = chunk_size;
+      data_byte_len = chunk_size;
+
+      snd_info->data_len = data_byte_len;
       snd_info->data_ptr = checked_malloc(snd_info->data_len);
 
       /* read sound data */
@@ -1358,8 +1689,8 @@ static SoundInfo *Load_WAV(char *filename)
        return NULL;
       }
 
-      /* check for odd number of sample bytes (data chunk is word aligned) */
-      if ((chunk_size % 2) == 1)
+      /* check for odd number of data bytes (data chunk is word aligned) */
+      if ((data_byte_len % 2) == 1)
        ReadUnusedBytesFromFile(file, 1);
     }
     else       /* unknown chunk -- ignore */
@@ -1375,127 +1706,46 @@ static SoundInfo *Load_WAV(char *filename)
     return NULL;
   }
 
-  snd_info->format = AUDIO_FORMAT_U8;
-
-#endif /* PLATFORM_UNIX */
-
-  snd_info->type = SND_TYPE_WAV;
-  snd_info->source_filename = getStringCopy(filename);
-
-  return snd_info;
-}
-
-static void deleteSoundEntry(SoundInfo **snd_info)
-{
-  if (*snd_info)
-  {
-    char *filename = (*snd_info)->source_filename;
-
-#if 0
-    printf("[decrementing reference counter of sound '%s']\n", filename);
-#endif
-
-    if (--(*snd_info)->num_references <= 0)
-    {
-#if 0
-      printf("[deleting sound '%s']\n", filename);
-#endif
-
-      /*
-      FreeSound(*snd_info);
-      */
-      deleteNodeFromList(&SoundFileList, filename, FreeSound);
-    }
-
-    *snd_info = NULL;
-  }
-}
-
-static void replaceSoundEntry(SoundInfo **snd_info, char *filename)
-{
-  ListNode *node;
-
-  /* check if the old and the new sound file are the same */
-  if (*snd_info && strcmp((*snd_info)->source_filename, filename) == 0)
+  if (header.bits_per_sample == 8)
+    snd_info->format = AUDIO_FORMAT_U8;
+  else                                 /* header.bits_per_sample == 16 */
   {
-    /* The old and new sound are the same (have the same filename and path).
-       This usually means that this sound does not exist in this sound set
-       and a fallback to the existing sound is done. */
-
-#if 0
-    printf("[sound '%s' already exists (same list entry)]\n", filename);
-#endif
-
-    return;
+    snd_info->format = AUDIO_FORMAT_S16;
+    snd_info->data_len /= 2;           /* correct number of samples */
   }
 
-  /* delete existing sound file entry */
-  deleteSoundEntry(snd_info);
+  snd_info->num_channels = header.num_channels;
+  if (header.num_channels == 2)
+    snd_info->data_len /= 2;           /* correct number of samples */
 
-  /* check if the new sound file already exists in the list of sounds */
-  if ((node = getNodeFromKey(SoundFileList, filename)) != NULL)
-  {
 #if 0
-      printf("[sound '%s' already exists (other list entry)]\n", filename);
-#endif
-
-      *snd_info = (SoundInfo *)node->content;
-      (*snd_info)->num_references++;
-  }
-  else if ((*snd_info = Load_WAV(filename)) != NULL)   /* load new sound */
+  if (header.num_channels == 1)                /* convert mono sound to stereo */
   {
-    (*snd_info)->num_references = 1;
-    addNodeToList(&SoundFileList, (*snd_info)->source_filename, *snd_info);
+    void *buffer_ptr = checked_malloc(data_byte_len * 2);
+    void *sample_ptr = snd_info->data_ptr;
+    int sample_size = snd_info->data_len;
+    int i;
+
+    if (snd_ctrl->format == AUDIO_FORMAT_U8)
+      for (i = 0; i < sample_size; i++)
+       *buffer_ptr++ =
+         ((short)(((byte *)sample_ptr)[i] ^ 0x80)) << 8;
+    else       /* AUDIO_FORMAT_S16 */
+      for (i = 0; i < sample_size; i++)
+       *buffer_ptr++ =
+         ((short *)sample_ptr)[i];
   }
-}
-
-static void LoadCustomSound(SoundInfo **snd_info, char *basename)
-{
-  char *filename = getCustomSoundFilename(basename);
-
-  if (strcmp(basename, SND_FILE_UNDEFINED) == 0)
-  {
-    deleteSoundEntry(snd_info);
-    return;
-  }
-
-  if (filename == NULL)
-  {
-    Error(ERR_WARN, "cannot find sound file '%s'", basename);
-    return;
-  }
-
-  replaceSoundEntry(snd_info, filename);
-}
-
-void InitSoundList(struct SoundEffectInfo *sounds_list, int num_list_entries)
-{
-  if (Sound == NULL)
-    Sound = checked_calloc(num_list_entries * sizeof(SoundInfo *));
-
-  sound_effect = sounds_list;
-  num_sounds = num_list_entries;
-}
-
-void LoadSoundToList(char *basename, int list_pos)
-{
-  if (Sound == NULL || list_pos >= num_sounds)
-    return;
-
-#if 0
-  printf("loading sound '%s' ...  [%d]\n",
-        basename, getNumNodes(SoundFileList));
 #endif
 
-  LoadCustomSound(&Sound[list_pos], basename);
+#endif /* AUDIO_UNIX_NATIVE */
 
-#if 0
-  printf("loading sound '%s' done [%d]\n",
-        basename, getNumNodes(SoundFileList));
-#endif
+  snd_info->type = SND_TYPE_WAV;
+  snd_info->source_filename = getStringCopy(filename);
+
+  return snd_info;
 }
 
-static MusicInfo *Load_MOD(char *filename)
+static void *Load_MOD(char *filename)
 {
 #if defined(TARGET_SDL)
   MusicInfo *mod_info;
@@ -1521,15 +1771,47 @@ static MusicInfo *Load_MOD(char *filename)
 #endif
 }
 
-void LoadCustomMusic(void)
+static void *Load_WAV_or_MOD(char *filename)
 {
+#if 1
+  if (FileIsMusic(filename))
+    return Load_MOD(filename);
+  else if (FileIsSound(filename))
+    return Load_WAV(filename);
+  else
+    return NULL;
+#else
+  if (FileIsSound(filename))
+    return Load_WAV(filename);
+  else if (FileIsMusic(filename))
+    return Load_MOD(filename);
+  else
+    return NULL;
+#endif
+}
+
+void LoadCustomMusic_NoConf(void)
+{
+  static boolean draw_init_text = TRUE;                /* only draw at startup */
+  static char *last_music_directory = NULL;
   char *music_directory = getCustomMusicDirectory();
   DIR *dir;
   struct dirent *dir_entry;
+  int num_music = getMusicListSize();
 
   if (!audio.sound_available)
     return;
 
+  if (last_music_directory != NULL &&
+      strEqual(last_music_directory, music_directory))
+    return;    /* old and new music directory are the same */
+
+  if (last_music_directory != NULL)
+    free(last_music_directory);
+  last_music_directory = getStringCopy(music_directory);
+
+  FreeAllMusic_NoConf();
+
   if ((dir = opendir(music_directory)) == NULL)
   {
     Error(ERR_WARN, "cannot read music directory '%s'", music_directory);
@@ -1537,82 +1819,307 @@ void LoadCustomMusic(void)
     return;
   }
 
+  if (draw_init_text)
+    DrawInitText("Loading music", 120, FC_GREEN);
+
   while ((dir_entry = readdir(dir)) != NULL)   /* loop until last dir entry */
   {
     char *basename = dir_entry->d_name;
-    char *filename = getPath2(music_directory, basename);
+    char *filename = NULL;
     MusicInfo *mus_info = NULL;
+    boolean music_already_used = FALSE;
+    int i;
+
+    /* skip all music files that are configured in music config file */
+    for (i = 0; i < num_music; i++)
+    {
+      struct FileInfo *music = getMusicListEntry(i);
+
+      if (strEqual(basename, music->filename))
+      {
+       music_already_used = TRUE;
+       break;
+      }
+    }
+
+    if (music_already_used)
+      continue;
+
+    if (draw_init_text)
+      DrawInitText(basename, 150, FC_YELLOW);
 
-    if (FileIsSound(basename))
-      mus_info = Load_WAV(filename);
-    else if (FileIsMusic(basename))
-      mus_info = Load_MOD(filename);
+    filename = getPath2(music_directory, basename);
+
+    if (FileIsMusic(basename))
+      mus_info = Load_WAV_or_MOD(filename);
 
     free(filename);
 
     if (mus_info)
     {
-      num_music++;
-      Music = checked_realloc(Music, num_music * sizeof(MusicInfo *));
-      Music[num_music -1] = mus_info;
+      num_music_noconf++;
+      Music_NoConf = checked_realloc(Music_NoConf,
+                                    num_music_noconf * sizeof(MusicInfo *));
+      Music_NoConf[num_music_noconf - 1] = mus_info;
     }
   }
 
   closedir(dir);
 
-  if (num_music == 0)
-    Error(ERR_WARN, "cannot find any valid music files in directory '%s'",
-         music_directory);
+  draw_init_text = FALSE;
 }
 
-void PlayMusic(int nr)
+int getSoundListSize()
 {
-  if (!audio.music_available)
-    return;
+  return (sound_info->num_file_list_entries +
+         sound_info->num_dynamic_file_list_entries);
+}
 
-#if defined(TARGET_SDL)
+int getMusicListSize()
+{
+  return (music_info->num_file_list_entries +
+         music_info->num_dynamic_file_list_entries);
+}
 
-  nr = nr % num_music;
+struct FileInfo *getSoundListEntry(int pos)
+{
+  int num_list_entries = sound_info->num_file_list_entries;
+  int list_pos = (pos < num_list_entries ? pos : pos - num_list_entries);
 
-  if (Music[nr]->type == MUS_TYPE_MOD)
-  {
-    Mix_PlayMusic(Music[nr]->data_ptr, -1);
-    Mix_VolumeMusic(SOUND_MAX_VOLUME); /* must be _after_ Mix_PlayMusic()! */
-  }
-  else                         /* play WAV music loop */
-  {
-    Mix_Volume(audio.music_channel, SOUND_MAX_VOLUME);
-    Mix_PlayChannel(audio.music_channel, Music[nr]->data_ptr, -1);
-  }
+  return (pos < num_list_entries ? &sound_info->file_list[list_pos] :
+         &sound_info->dynamic_file_list[list_pos]);
+}
 
-#else
+struct FileInfo *getMusicListEntry(int pos)
+{
+  int num_list_entries = music_info->num_file_list_entries;
+  int list_pos = (pos < num_list_entries ? pos : pos - num_list_entries);
 
-  PlaySoundMusic(nr);
+  return (pos < num_list_entries ? &music_info->file_list[list_pos] :
+         &music_info->dynamic_file_list[list_pos]);
+}
 
-#endif
+static SoundInfo *getSoundInfoEntryFromSoundID(int pos)
+{
+  int num_list_entries = sound_info->num_file_list_entries;
+  int list_pos = (pos < num_list_entries ? pos : pos - num_list_entries);
+  SoundInfo **snd_info =
+    (SoundInfo **)(pos < num_list_entries ? sound_info->artwork_list :
+                  sound_info->dynamic_artwork_list);
+
+  return snd_info[list_pos];
+}
+
+static MusicInfo *getMusicInfoEntryFromMusicID(int pos)
+{
+  int num_list_entries = music_info->num_file_list_entries;
+  int list_pos = (pos < num_list_entries ? pos : pos - num_list_entries);
+  MusicInfo **mus_info =
+    (MusicInfo **)(pos < num_list_entries ? music_info->artwork_list :
+                  music_info->dynamic_artwork_list);
+
+  return mus_info[list_pos];
+}
+
+int getSoundListPropertyMappingSize()
+{
+  return sound_info->num_property_mapping_entries;
+}
+
+int getMusicListPropertyMappingSize()
+{
+  return music_info->num_property_mapping_entries;
+}
+
+struct PropertyMapping *getSoundListPropertyMapping()
+{
+  return sound_info->property_mapping;
+}
+
+struct PropertyMapping *getMusicListPropertyMapping()
+{
+  return music_info->property_mapping;
+}
+
+void InitSoundList(struct ConfigInfo *config_list, int num_file_list_entries,
+                  struct ConfigTypeInfo *config_suffix_list,
+                  char **base_prefixes, char **ext1_suffixes,
+                  char **ext2_suffixes, char **ext3_suffixes,
+                  char **ignore_tokens)
+{
+  int i;
+
+  sound_info = checked_calloc(sizeof(struct ArtworkListInfo));
+  sound_info->type = ARTWORK_TYPE_SOUNDS;
+
+  /* ---------- initialize file list and suffix lists ---------- */
+
+  sound_info->num_file_list_entries = num_file_list_entries;
+  sound_info->num_dynamic_file_list_entries = 0;
+
+  sound_info->file_list =
+    getFileListFromConfigList(config_list, config_suffix_list, ignore_tokens,
+                             num_file_list_entries);
+  sound_info->dynamic_file_list = NULL;
+
+  sound_info->num_suffix_list_entries = 0;
+  for (i = 0; config_suffix_list[i].token != NULL; i++)
+    sound_info->num_suffix_list_entries++;
+
+  sound_info->suffix_list = config_suffix_list;
+
+  /* ---------- initialize base prefix and suffixes lists ---------- */
+
+  sound_info->num_base_prefixes = 0;
+  for (i = 0; base_prefixes[i] != NULL; i++)
+    sound_info->num_base_prefixes++;
+
+  sound_info->num_ext1_suffixes = 0;
+  for (i = 0; ext1_suffixes[i] != NULL; i++)
+    sound_info->num_ext1_suffixes++;
+
+  sound_info->num_ext2_suffixes = 0;
+  for (i = 0; ext2_suffixes[i] != NULL; i++)
+    sound_info->num_ext2_suffixes++;
+
+  sound_info->num_ext3_suffixes = 0;
+  for (i = 0; ext3_suffixes[i] != NULL; i++)
+    sound_info->num_ext3_suffixes++;
+
+  sound_info->num_ignore_tokens = 0;
+  for (i = 0; ignore_tokens[i] != NULL; i++)
+    sound_info->num_ignore_tokens++;
+
+  sound_info->base_prefixes = base_prefixes;
+  sound_info->ext1_suffixes = ext1_suffixes;
+  sound_info->ext2_suffixes = ext2_suffixes;
+  sound_info->ext3_suffixes = ext3_suffixes;
+  sound_info->ignore_tokens = ignore_tokens;
+
+  sound_info->num_property_mapping_entries = 0;
+
+  sound_info->property_mapping = NULL;
+
+  /* ---------- initialize artwork reference and content lists ---------- */
+
+  sound_info->sizeof_artwork_list_entry = sizeof(SoundInfo *);
+
+  sound_info->artwork_list =
+    checked_calloc(num_file_list_entries * sizeof(SoundInfo *));
+  sound_info->dynamic_artwork_list = NULL;
+
+  sound_info->content_list = NULL;
+
+  /* ---------- initialize artwork loading/freeing functions ---------- */
+
+  sound_info->load_artwork = Load_WAV;
+  sound_info->free_artwork = FreeSound;
+}
+
+void InitMusicList(struct ConfigInfo *config_list, int num_file_list_entries,
+                  struct ConfigTypeInfo *config_suffix_list,
+                  char **base_prefixes, char **ext1_suffixes,
+                  char **ext2_suffixes, char **ext3_suffixes,
+                  char **ignore_tokens)
+{
+  int i;
+
+  music_info = checked_calloc(sizeof(struct ArtworkListInfo));
+  music_info->type = ARTWORK_TYPE_MUSIC;
+
+  /* ---------- initialize file list and suffix lists ---------- */
+
+  music_info->num_file_list_entries = num_file_list_entries;
+  music_info->num_dynamic_file_list_entries = 0;
+
+  music_info->file_list =
+    getFileListFromConfigList(config_list, config_suffix_list, ignore_tokens,
+                             num_file_list_entries);
+  music_info->dynamic_file_list = NULL;
+
+  music_info->num_suffix_list_entries = 0;
+  for (i = 0; config_suffix_list[i].token != NULL; i++)
+    music_info->num_suffix_list_entries++;
+
+  music_info->suffix_list = config_suffix_list;
+
+  /* ---------- initialize base prefix and suffixes lists ---------- */
+
+  music_info->num_base_prefixes = 0;
+  for (i = 0; base_prefixes[i] != NULL; i++)
+    music_info->num_base_prefixes++;
+
+  music_info->num_ext1_suffixes = 0;
+  for (i = 0; ext1_suffixes[i] != NULL; i++)
+    music_info->num_ext1_suffixes++;
+
+  music_info->num_ext2_suffixes = 0;
+  for (i = 0; ext2_suffixes[i] != NULL; i++)
+    music_info->num_ext2_suffixes++;
+
+  music_info->num_ext3_suffixes = 0;
+  for (i = 0; ext3_suffixes[i] != NULL; i++)
+    music_info->num_ext3_suffixes++;
+
+  music_info->num_ignore_tokens = 0;
+  for (i = 0; ignore_tokens[i] != NULL; i++)
+    music_info->num_ignore_tokens++;
+
+  music_info->base_prefixes = base_prefixes;
+  music_info->ext1_suffixes = ext1_suffixes;
+  music_info->ext2_suffixes = ext2_suffixes;
+  music_info->ext3_suffixes = ext3_suffixes;
+  music_info->ignore_tokens = ignore_tokens;
+
+  music_info->num_property_mapping_entries = 0;
+
+  music_info->property_mapping = NULL;
+
+  /* ---------- initialize artwork reference and content lists ---------- */
+
+  music_info->sizeof_artwork_list_entry = sizeof(MusicInfo *);
+
+  music_info->artwork_list =
+    checked_calloc(num_file_list_entries * sizeof(MusicInfo *));
+  music_info->dynamic_artwork_list = NULL;
+
+  music_info->content_list = NULL;
+
+  /* ---------- initialize artwork loading/freeing functions ---------- */
+
+  music_info->load_artwork = Load_WAV_or_MOD;
+  music_info->free_artwork = FreeMusic;
+}
+
+void PlayMusic(int nr)
+{
+  if (!audio.music_available)
+    return;
+
+  PlaySoundMusic(nr);
 }
 
 void PlaySound(int nr)
 {
-  PlaySoundExt(nr, PSND_MAX_VOLUME, PSND_MIDDLE, SND_CTRL_PLAY_SOUND);
+  PlaySoundExt(nr, SOUND_MAX_VOLUME, SOUND_MIDDLE, SND_CTRL_PLAY_SOUND);
 }
 
-void PlaySoundStereo(int nr, int stereo)
+void PlaySoundStereo(int nr, int stereo_position)
 {
-  PlaySoundExt(nr, PSND_MAX_VOLUME, stereo, SND_CTRL_PLAY_SOUND);
+  PlaySoundExt(nr, SOUND_MAX_VOLUME, stereo_position, SND_CTRL_PLAY_SOUND);
 }
 
 void PlaySoundLoop(int nr)
 {
-  PlaySoundExt(nr, PSND_MAX_VOLUME, PSND_MIDDLE, SND_CTRL_PLAY_LOOP);
+  PlaySoundExt(nr, SOUND_MAX_VOLUME, SOUND_MIDDLE, SND_CTRL_PLAY_LOOP);
 }
 
 void PlaySoundMusic(int nr)
 {
-  PlaySoundExt(nr, PSND_MAX_VOLUME, PSND_MIDDLE, SND_CTRL_PLAY_MUSIC);
+  PlaySoundExt(nr, SOUND_MAX_VOLUME, SOUND_MIDDLE, SND_CTRL_PLAY_MUSIC);
 }
 
-void PlaySoundExt(int nr, int volume, int stereo, int state)
+void PlaySoundExt(int nr, int volume, int stereo_position, int state)
 {
   SoundControl snd_ctrl;
 
@@ -1621,36 +2128,35 @@ void PlaySoundExt(int nr, int volume, int stereo, int state)
       audio.sound_deactivated)
     return;
 
-  if (volume < PSND_MIN_VOLUME)
-    volume = PSND_MIN_VOLUME;
-  else if (volume > PSND_MAX_VOLUME)
-    volume = PSND_MAX_VOLUME;
+  volume = SETUP_SOUND_VOLUME(volume, state);
+
+  if (volume < SOUND_MIN_VOLUME)
+    volume = SOUND_MIN_VOLUME;
+  else if (volume > SOUND_MAX_VOLUME)
+    volume = SOUND_MAX_VOLUME;
+
+  if (stereo_position < SOUND_MAX_LEFT)
+    stereo_position = SOUND_MAX_LEFT;
+  else if (stereo_position > SOUND_MAX_RIGHT)
+    stereo_position = SOUND_MAX_RIGHT;
 
-  if (stereo < PSND_MAX_LEFT)
-    stereo = PSND_MAX_LEFT;
-  else if (stereo > PSND_MAX_RIGHT)
-    stereo = PSND_MAX_RIGHT;
+  clear_mem(&snd_ctrl, sizeof(SoundControl));  /* to make valgrind happy */
 
   snd_ctrl.active = TRUE;
-  snd_ctrl.nr     = nr;
+  snd_ctrl.nr = nr;
   snd_ctrl.volume = volume;
-  snd_ctrl.stereo = stereo;
-  snd_ctrl.state  = state;
+  snd_ctrl.stereo_position = stereo_position;
+  snd_ctrl.state = state;
 
   HandleSoundRequest(snd_ctrl);
 }
 
 void FadeMusic(void)
 {
-  if (!audio.sound_available)
+  if (!audio.music_available)
     return;
 
-#if defined(TARGET_SDL)
-  Mix_FadeOutMusic(SOUND_FADING_INTERVAL);
-  Mix_FadeOutChannel(audio.music_channel, SOUND_FADING_INTERVAL);
-#else
   StopSoundExt(-1, SND_CTRL_FADE_MUSIC);
-#endif
 }
 
 void FadeSound(int nr)
@@ -1660,21 +2166,21 @@ void FadeSound(int nr)
 
 void FadeSounds()
 {
-  FadeMusic();
   StopSoundExt(-1, SND_CTRL_FADE_ALL);
 }
 
+void FadeSoundsAndMusic()
+{
+  FadeSounds();
+  FadeMusic();
+}
+
 void StopMusic(void)
 {
-#if defined(TARGET_SDL)
-  if (!audio.sound_available)
+  if (!audio.music_available)
     return;
 
-  Mix_HaltMusic();
-  Mix_HaltChannel(audio.music_channel);
-#else
   StopSoundExt(-1, SND_CTRL_STOP_MUSIC);
-#endif
 }
 
 void StopSound(int nr)
@@ -1695,185 +2201,61 @@ void StopSoundExt(int nr, int state)
   if (!audio.sound_available)
     return;
 
+  clear_mem(&snd_ctrl, sizeof(SoundControl));  /* to make valgrind happy */
+
   snd_ctrl.active = FALSE;
-  snd_ctrl.nr     = nr;
-  snd_ctrl.state  = state;
+  snd_ctrl.nr = nr;
+  snd_ctrl.state = state;
 
   HandleSoundRequest(snd_ctrl);
 }
 
-ListNode *newListNode()
-{
-  return checked_calloc(sizeof(ListNode));
-}
-
-void addNodeToList(ListNode **node_first, char *key, void *content)
-{
-  ListNode *node_new = newListNode();
-
-#if 0
-  printf("LIST: adding node with key '%s'\n", key);
-#endif
-
-  node_new->key = getStringCopy(key);
-  node_new->content = content;
-  node_new->next = *node_first;
-  *node_first = node_new;
-}
-
-void deleteNodeFromList(ListNode **node_first, char *key,
-                       void (*destructor_function)(void *))
-{
-  if (node_first == NULL || *node_first == NULL)
-    return;
-
-#if 0
-  printf("[CHECKING LIST KEY '%s' == '%s']\n",
-        (*node_first)->key, key);
-#endif
-
-  if (strcmp((*node_first)->key, key) == 0)
-  {
-#if 0
-    printf("[DELETING LIST ENTRY]\n");
-#endif
-
-    free((*node_first)->key);
-    if (destructor_function)
-      destructor_function((*node_first)->content);
-    *node_first = (*node_first)->next;
-  }
-  else
-    deleteNodeFromList(&(*node_first)->next, key, destructor_function);
-}
-
-ListNode *getNodeFromKey(ListNode *node_first, char *key)
-{
-  if (node_first == NULL)
-    return NULL;
-
-  if (strcmp(node_first->key, key) == 0)
-    return node_first;
-  else
-    return getNodeFromKey(node_first->next, key);
-}
-
-int getNumNodes(ListNode *node_first)
-{
-  return (node_first ? 1 + getNumNodes(node_first->next) : 0);
-}
-
-void dumpList(ListNode *node_first)
-{
-  ListNode *node = node_first;
-
-  while (node)
-  {
-    printf("['%s' (%d)]\n", node->key,
-          ((SoundInfo *)node->content)->num_references);
-    node = node->next;
-  }
-
-  printf("[%d nodes]\n", getNumNodes(node_first));
-}
-
-static void LoadSoundsInfo()
-{
-  char *filename = getCustomSoundConfigFilename();
-  struct SetupFileList *setup_file_list;
-  int i;
-
-  /* always start with reliable default values */
-  for (i=0; i<num_sounds; i++)
-    sound_effect[i].filename = NULL;
-
-  if (filename == NULL)
-    return;
-
-  if ((setup_file_list = loadSetupFileList(filename)))
-  {
-    for (i=0; i<num_sounds; i++)
-      sound_effect[i].filename =
-       getStringCopy(getTokenValue(setup_file_list, sound_effect[i].text));
-
-    freeSetupFileList(setup_file_list);
-
-#if 1
-    for (i=0; i<num_sounds; i++)
-    {
-      printf("'%s' ", sound_effect[i].text);
-      if (sound_effect[i].filename)
-       printf("-> '%s'\n", sound_effect[i].filename);
-      else
-       printf("-> UNDEFINED [-> '%s']\n", sound_effect[i].default_filename);
-    }
-#endif
-  }
-}
-
 static void ReloadCustomSounds()
 {
-  int i;
-
-#if 0
-  printf("DEBUG: reloading sounds '%s' ...\n", artwork.sounds_set_current);
-#endif
-
-  LoadSoundsInfo();
-
 #if 0
-  printf("DEBUG: reloading %d sounds ...\n", num_sounds);
+  printf("::: reloading sounds '%s' ...\n", artwork.snd_current_identifier);
 #endif
 
-  for(i=0; i<num_sounds; i++)
-  {
-    if (sound_effect[i].filename)
-      LoadSoundToList(sound_effect[i].filename, i);
-    else
-      LoadSoundToList(sound_effect[i].default_filename, i);
-  }
-
-  /*
-  printf("list size == %d\n", getNumNodes(SoundFileList));
-  */
-
-#if 0
-  dumpList(SoundFileList);
-#endif
+  LoadArtworkConfig(sound_info);
+  ReloadCustomArtworkList(sound_info);
 }
 
 static void ReloadCustomMusic()
 {
 #if 0
-  printf("DEBUG: reloading music '%s' ...\n", artwork.music_set_current);
+  printf("::: reloading music '%s' ...\n", artwork.mus_current_identifier);
 #endif
 
-  FreeAllMusic();
+  LoadArtworkConfig(music_info);
+  ReloadCustomArtworkList(music_info);
 
-  LoadCustomMusic();
+  /* load all music files from directory not defined in "musicinfo.conf" */
+  LoadCustomMusic_NoConf();
 }
 
-void InitReloadSounds(char *set_name)
+void InitReloadCustomSounds(char *set_identifier)
 {
   if (!audio.sound_available)
     return;
 
-#if defined(TARGET_SDL) || defined(TARGET_ALLEGRO)
+#if defined(AUDIO_UNIX_NATIVE)
+  LoadArtworkConfig(sound_info);       /* also load config on sound client */
+  WriteReloadInfoToPipe(set_identifier, SND_CTRL_RELOAD_SOUNDS);
+#else
   ReloadCustomSounds();
-#elif defined(PLATFORM_UNIX)
-  WriteReloadInfoToPipe(set_name, SND_CTRL_RELOAD_SOUNDS);
 #endif
 }
 
-void InitReloadMusic(char *set_name)
+void InitReloadCustomMusic(char *set_identifier)
 {
   if (!audio.music_available)
     return;
 
-#if defined(TARGET_SDL) || defined(TARGET_ALLEGRO)
+#if defined(AUDIO_UNIX_NATIVE)
+  LoadArtworkConfig(music_info);       /* also load config on sound client */
+  WriteReloadInfoToPipe(set_identifier, SND_CTRL_RELOAD_MUSIC);
+#else
   ReloadCustomMusic();
-#elif defined(PLATFORM_UNIX)
-  WriteReloadInfoToPipe(set_name, SND_CTRL_RELOAD_MUSIC);
 #endif
 }
 
@@ -1890,19 +2272,20 @@ void FreeSound(void *ptr)
     Mix_FreeChunk(sound->data_ptr);
 #elif defined(TARGET_ALLEGRO)
     destroy_sample(sound->data_ptr);
-#else  /* PLATFORM_UNIX */
+#else /* AUDIO_UNIX_NATIVE */
     free(sound->data_ptr);
 #endif
   }
 
-  if (sound->source_filename)
-    free(sound->source_filename);
+  checked_free(sound->source_filename);
 
   free(sound);
 }
 
-void FreeMusic(MusicInfo *music)
+void FreeMusic(void *ptr)
 {
+  MusicInfo *music = (MusicInfo *)ptr;
+
   if (music == NULL)
     return;
 
@@ -1915,7 +2298,7 @@ void FreeMusic(MusicInfo *music)
       Mix_FreeChunk(music->data_ptr);
 #elif defined(TARGET_ALLEGRO)
     destroy_sample(music->data_ptr);
-#else  /* PLATFORM_UNIX */
+#else /* AUDIO_UNIX_NATIVE */
     free(music->data_ptr);
 #endif
   }
@@ -1923,45 +2306,31 @@ void FreeMusic(MusicInfo *music)
   free(music);
 }
 
-void FreeAllSounds()
+static void FreeAllMusic_NoConf()
 {
   int i;
 
-  if (Sound == NULL)
+  if (Music_NoConf == NULL)
     return;
 
-  printf("%s: FREEING SOUNDS ...\n",
-        IS_CHILD_PROCESS(audio.mixer_pid) ? "CHILD" : "PARENT");
+  for (i = 0; i < num_music_noconf; i++)
+    FreeMusic(Music_NoConf[i]);
 
-  for(i=0; i<num_sounds; i++)
-    deleteSoundEntry(&Sound[i]);
-  /*
-    FreeSound(Sound[i]);
-  */
+  free(Music_NoConf);
 
-  printf("%s: FREEING SOUNDS -- DONE\n",
-        IS_CHILD_PROCESS(audio.mixer_pid) ? "CHILD" : "PARENT");
-
-  free(Sound);
+  Music_NoConf = NULL;
+  num_music_noconf = 0;
+}
 
-  Sound = NULL;
-  num_sounds = 0;
+void FreeAllSounds()
+{
+  FreeCustomArtworkLists(sound_info);
 }
 
 void FreeAllMusic()
 {
-  int i;
-
-  if (Music == NULL)
-    return;
-
-  for(i=0; i<num_music; i++)
-    FreeMusic(Music[i]);
-
-  free(Music);
-
-  Music = NULL;
-  num_music = 0;
+  FreeCustomArtworkLists(music_info);
+  FreeAllMusic_NoConf();
 }
 
 /* THE STUFF ABOVE IS ONLY USED BY THE MAIN PROCESS                          */