Exposed registering a handler for playing sounds.

src/play_sound.c

@@ -0,0 +1,9 @@
+#include "play_sound.h"
+
+SM64PlaySoundFunctionPtr g_play_sound_func = NULL;
+
+extern void play_sound( uint32_t soundBits, f32 *pos ) {
+  if ( g_play_sound_func ) {
+    g_play_sound_func(soundBits, pos);
+  }
+}