diff --git a/src/mixer.cpp b/src/mixer.cpp
--- a/src/mixer.cpp
+++ b/src/mixer.cpp
@@ -21,8 +21,6 @@ struct MixerChannel {
 	/* Mixing volume */
 	int volume_left;
 	int volume_right;
-
-	uint flags;
 };
 
 static MixerChannel _channels[8];
@@ -80,7 +78,7 @@ static void mix_int8_to_int16(MixerChann
 
 static void MxCloseChannel(MixerChannel *mc)
 {
-	if (mc->flags & MX_AUTOFREE) free(mc->memory);
+	free(mc->memory);
 	mc->active = false;
 	mc->memory = NULL;
 }
@@ -112,10 +110,9 @@ MixerChannel *MxAllocateChannel()
 	return NULL;
 }
 
-void MxSetChannelRawSrc(MixerChannel *mc, int8 *mem, size_t size, uint rate, uint flags)
+void MxSetChannelRawSrc(MixerChannel *mc, int8 *mem, size_t size, uint rate)
 {
 	mc->memory = mem;
-	mc->flags = flags;
 	mc->frac_pos = 0;
 	mc->pos = 0;
 
diff --git a/src/mixer.h b/src/mixer.h
--- a/src/mixer.h
+++ b/src/mixer.h
@@ -7,18 +7,11 @@
 
 struct MixerChannel;
 
-enum {
-	MX_AUTOFREE = 1,
-//	MX_8BIT = 2,
-//	MX_STEREO = 4,
-//	MX_UNSIGNED = 8,
-};
-
 bool MxInitialize(uint rate);
 void MxMixSamples(void *buffer, uint samples);
 
 MixerChannel *MxAllocateChannel();
-void MxSetChannelRawSrc(MixerChannel *mc, int8 *mem, size_t size, uint rate, uint flags);
+void MxSetChannelRawSrc(MixerChannel *mc, int8 *mem, size_t size, uint rate);
 void MxSetChannelVolume(MixerChannel *mc, uint left, uint right);
 void MxActivateChannel(MixerChannel*);
 
diff --git a/src/sound.cpp b/src/sound.cpp
--- a/src/sound.cpp
+++ b/src/sound.cpp
@@ -111,7 +111,7 @@ static bool SetBankSource(MixerChannel *
 
 	assert(sound->bits_per_sample == 8 && sound->channels == 1 && sound->file_size != 0 && sound->rate != 0);
 
-	MxSetChannelRawSrc(mc, mem, sound->file_size, sound->rate, MX_AUTOFREE);
+	MxSetChannelRawSrc(mc, mem, sound->file_size, sound->rate);
 
 	return true;
 }