7 #include <util/delay.h>
8 #include "musical_notes.h"
13 // Largely untested PWM audio mode (doesn't sound as good)
16 // #define VIBRATO_ENABLE
18 // Enable vibrato strength/amplitude - slows down ISR too much
19 // #define VIBRATO_STRENGTH_ENABLE
29 bool is_audio_on(void);
30 void audio_toggle(void);
34 // Vibrato rate functions
38 void set_vibrato_rate(float rate);
39 void increase_vibrato_rate(float change);
40 void decrease_vibrato_rate(float change);
42 #ifdef VIBRATO_STRENGTH_ENABLE
44 void set_vibrato_strength(float strength);
45 void increase_vibrato_strength(float change);
46 void decrease_vibrato_strength(float change);
52 // Polyphony functions
54 void set_polyphony_rate(float rate);
55 void enable_polyphony(void);
56 void disable_polyphony(void);
57 void increase_polyphony_rate(float change);
58 void decrease_polyphony_rate(float change);
60 void set_timbre(float timbre);
61 void set_tempo(uint8_t tempo);
63 void increase_tempo(uint8_t tempo_change);
64 void decrease_tempo(uint8_t tempo_change);
66 void audio_init(void);
69 void play_sample(uint8_t * s, uint16_t l, bool r);
71 void play_note(float freq, int vol);
72 void stop_note(float freq);
73 void stop_all_notes(void);
74 void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest);
76 #define SCALE (int8_t []){ 0 + (12*0), 2 + (12*0), 4 + (12*0), 5 + (12*0), 7 + (12*0), 9 + (12*0), 11 + (12*0), \
77 0 + (12*1), 2 + (12*1), 4 + (12*1), 5 + (12*1), 7 + (12*1), 9 + (12*1), 11 + (12*1), \
78 0 + (12*2), 2 + (12*2), 4 + (12*2), 5 + (12*2), 7 + (12*2), 9 + (12*2), 11 + (12*2), \
79 0 + (12*3), 2 + (12*3), 4 + (12*3), 5 + (12*3), 7 + (12*3), 9 + (12*3), 11 + (12*3), \
80 0 + (12*4), 2 + (12*4), 4 + (12*4), 5 + (12*4), 7 + (12*4), 9 + (12*4), 11 + (12*4), }
82 // These macros are used to allow play_notes to play an array of indeterminate
83 // length. This works around the limitation of C's sizeof operation on pointers.
84 // The global float array for the song must be used here.
85 #define NOTE_ARRAY_SIZE(x) ((int16_t)(sizeof(x) / (sizeof(x[0]))))
86 #define PLAY_NOTE_ARRAY(note_array, note_repeat, note_rest_style) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), (note_repeat), (note_rest_style));
89 bool is_playing_notes(void);