4 #include <util/delay.h>
5 #include "musical_notes.h"
11 float voice_envelope(float frequency);
20 // delayed_vibrato_octave,
24 // duty_fifth_third_down,
25 number_of_voices // important that this is last
28 void set_voice(voice_type v);
29 void voice_iterate(void);
30 void voice_deiterate(void);