diff --git a/main.h b/main.h
index 4726117..ee3eaa2 100644
--- a/main.h
+++ b/main.h
@@ -15,7 +15,6 @@ void unigi_graphics_flush();
 
 // INPUT
 void unigi_input_mouse_capture(unigi_type_bool captured);
-
 unigi_type_error unigi_window_create(unigi_type_resolution resolution, char * title);
 unigi_type_time_span unigi_time_get();
 
@@ -23,4 +22,7 @@ unigi_type_time_span unigi_time_get();
 #define unigi_time_clocks_per_s 1000000
 void unigi_time_sleep(unigi_type_time_span ms);
 void unigi_event_get(unigi_type_event * event);
+
+// SOUND
+unigi_type_error unigi_sound_init(void (* callback)(uint8_t *, size_t));
 #endif