diff --git a/snd/sounds/afterburner.wav b/snd/sounds/afterburner.wav
new file mode 100644
index 0000000..4b6accc
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diff --git a/snd/sounds/engine.wav b/snd/sounds/engine.wav
index 7727f09..282b36d 100644
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diff --git a/snd/sounds/mass.wav b/snd/sounds/mass.wav
new file mode 100644
index 0000000..affeacf
Binary files /dev/null and b/snd/sounds/mass.wav differ
diff --git a/snd/sounds/neutron.wav b/snd/sounds/neutron.wav
new file mode 100644
index 0000000..9a2b62e
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diff --git a/src/sound.c b/src/sound.c
index 3a99a18..c7b79f3 100644
--- a/src/sound.c
+++ b/src/sound.c
@@ -86,7 +86,7 @@ static int source_nstack = 0;
 struct alVoice {
   alVoice* next;      // Yes it's a linked list.
 
-  ALuint id;          // Unique id for the voice.
+  //ALuint id;          // Unique id for the voice.
 
   ALuint source;      // Source itself, 0 if not set.
   ALuint buffer;      // Buffer.
@@ -94,7 +94,7 @@ struct alVoice {
   int priority;       // Base priority.
 
   double px, py;      // Position.
-  double vx, vy;      // Velocity.
+  //double vx, vy;      // Velocity.
 
   unsigned int start; // time started in ms.
   unsigned int flags; // Flags to set properties.
@@ -105,10 +105,11 @@ static alVoice* voice_end   = NULL;
 // Volume.
 static ALfloat svolume = 0.3;
 
-static int sound_makeList(void);
-static int sound_load(ALuint* buffer, char* filename);
+static int  sound_makeList(void);
+static int  sound_load(ALuint* buffer, char* filename);
 static void sound_free(alSound* snd);
-static int voice_getSource(alVoice* voc);
+static int  voice_getSource(alVoice* voc);
+static void voice_rm(alVoice* prev, alVoice* voice);
 
 int sound_init(void) {
   int mem, ret = 0;
@@ -224,6 +225,14 @@ void sound_exit(void) {
     music_exit();
   }
 
+  // Clean up the voices.
+  while(voice_start != NULL)
+    voice_rm(NULL, voice_start);
+
+  // Clean up the sources.
+  if(source_stack)
+    alDeleteSources(source_nstack, source_stack);
+
   if(sound_lock) {
     SDL_mutexP(sound_lock);
 
@@ -296,7 +305,7 @@ static int sound_makeList(void) {
     free(files[i]);
   free(files);
 
-  DEBUG("Loaded %d sound%s", nsound_list, (nsound_list==1)?"":'s');
+  DEBUG("Loaded %d sound%s", nsound_list, (nsound_list==1)?"":"s");
 
   return 0;
 }
@@ -345,7 +354,6 @@ static void sound_free(alSound* snd) {
 
 // Update the sounds and prioritize them.
 void sound_update(void) {
-  ALint stat;
   alVoice* voice, *prev, *next;
 
   if(sound_lock == NULL)  return; // Sound system is off.
@@ -364,34 +372,38 @@ void sound_update(void) {
           voice->px, voice->py, 0.);
       /*alSource3f(voice->source, AL_VELOCITY,
           voice->vx, voice->vy, 0.);*/
-    } else { // Delete them.
-      if(voice->source != 0) {
-        // Sources must exist.
-
-        // Stop it if playing.
-        alGetSourcei(voice->source, AL_SOURCE_STATE, &stat);
-        if(stat == AL_PLAYING) alSourceStop(voice->source);
-
-        // Clear it and get rid of it.
-        source_stack[source_nstack++] == voice->source; // throw it back.
-      }
-
-      // Delete from linked list.
-      if(prev == NULL)
-        voice_start = voice->next;
-      else // Not first member.
-        prev->next = voice->next;
-      if(voice_end == voice)
-        voice_end = prev;
-      free(voice);
-    }
-    prev = voice;
+      prev = voice; // Only case where voice will stay.
+    } else // Delete them.
+      voice_rm(prev, voice);
     voice = next;
   } while(voice != NULL);
   
   SDL_mutexV(sound_lock);
 }
 
+// Remove a voice.
+static void voice_rm(alVoice* prev, alVoice* voice) {
+  ALint stat;
+
+  if(voice->source != 0) { // Source must exist.
+    // Stop it if playing.
+    alGetSourcei(voice->source, AL_SOURCE_STATE, &stat);
+    if(stat == AL_PLAYING) alSourceStop(voice->source);
+
+    // Clear it and get rid of it.
+    source_stack[source_nstack++] = voice->source; // Throw it back.
+  }
+
+  // Delete from linked list.
+  if(prev == NULL) // Was the first member.
+    voice_start = voice->next;
+  else // Not first memmber.
+    prev->next = voice->next;
+  if(voice_end == voice) // Last voice in linked list.
+    voice_end = prev;
+  free(voice);
+}
+
 // Set all the sounds volume to vol.
 void sound_volume(const double vol) {
   if(sound_lock == NULL) return;