1 files changed, 15 insertions, 2 deletions

diff --git a/quantum/audio.h b/quantum/audio.h
index 65a6f9434..762c98064 100644
--- a/quantum/audio.h
+++ b/quantum/audio.h
@@ -4,6 +4,9 @@
 #include <util/delay.h>
 #include "musical_notes.h"
 
+#ifndef AUDIO_H
+#define AUDIO_H
+
 typedef union {
     uint8_t raw;
     struct {
@@ -19,6 +22,16 @@ void audio_off(void);
 void play_sample(uint8_t * s, uint16_t l, bool r);
 void play_note(double freq, int vol);
 void stop_note(double freq);
-void stop_all_notes();
-void init_notes();
+void stop_all_notes(void);
+void init_notes(void);
 void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat, float n_rest);
+
+
+// These macros are used to allow play_notes to play an array of indeterminate
+// length. This works around the limitation of C's sizeof operation on pointers.
+// The global float array for the song must be used here.
+#define NOTE_ARRAY_SIZE(x) ((int)(sizeof(x) / (sizeof(x[0]))))
+#define PLAY_NOTE_ARRAY(note_array, note_repeat, note_rest_style) play_notes(&note_array, NOTE_ARRAY_SIZE((note_array)), (note_repeat), (note_rest_style));
+
+
+#endif
\ No newline at end of file