4 #include <util/delay.h>
14 void audio_toggle(void);
18 void play_sample(uint8_t * s, uint16_t l, bool r);
19 void play_note(double freq, int vol);
20 void stop_note(double freq);
21 void stop_all_notes();
23 void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat);