4 #include <util/delay.h>
5 #include "musical_notes.h"
12 // Largely untested PWM audio mode (doesn't sound as good)
15 // #define VIBRATO_ENABLE
17 // Enable vibrato strength/amplitude - slows down ISR too much
18 // #define VIBRATO_STRENGTH_ENABLE
28 bool is_audio_on(void);
29 void audio_toggle(void);
33 // Vibrato rate functions
37 void set_vibrato_rate(float rate);
38 void increase_vibrato_rate(float change);
39 void decrease_vibrato_rate(float change);
41 #ifdef VIBRATO_STRENGTH_ENABLE
43 void set_vibrato_strength(float strength);
44 void increase_vibrato_strength(float change);
45 void decrease_vibrato_strength(float change);
51 // Polyphony functions
53 void set_polyphony_rate(float rate);
54 void enable_polyphony(void);
55 void disable_polyphony(void);
56 void increase_polyphony_rate(float change);
57 void decrease_polyphony_rate(float change);
59 void set_timbre(float timbre);
60 void set_tempo(uint8_t tempo);
62 void increase_tempo(uint8_t tempo_change);
63 void decrease_tempo(uint8_t tempo_change);
65 void audio_init(void);
68 void play_sample(uint8_t * s, uint16_t l, bool r);
70 void play_note(float freq, int vol);
71 void stop_note(float freq);
72 void stop_all_notes(void);
73 void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest);
75 #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), \
76 0 + (12*1), 2 + (12*1), 4 + (12*1), 5 + (12*1), 7 + (12*1), 9 + (12*1), 11 + (12*1), \
77 0 + (12*2), 2 + (12*2), 4 + (12*2), 5 + (12*2), 7 + (12*2), 9 + (12*2), 11 + (12*2), \
78 0 + (12*3), 2 + (12*3), 4 + (12*3), 5 + (12*3), 7 + (12*3), 9 + (12*3), 11 + (12*3), \
79 0 + (12*4), 2 + (12*4), 4 + (12*4), 5 + (12*4), 7 + (12*4), 9 + (12*4), 11 + (12*4), }
81 // These macros are used to allow play_notes to play an array of indeterminate
82 // length. This works around the limitation of C's sizeof operation on pointers.
83 // The global float array for the song must be used here.
84 #define NOTE_ARRAY_SIZE(x) ((int16_t)(sizeof(x) / (sizeof(x[0]))))
85 #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));
88 bool is_playing_notes(void);
90 void play_goodbye_tone(void);
91 void play_startup_tone(void);
92 void audio_on_user(void);
93 void play_music_scale(void);