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#include <stdint.h> #include <stdbool.h> #include <avr/io.h> #include <util/delay.h> #include "musical_notes.h" #include "song_list.h" #ifndef VOICES_H #define VOICES_H float voice_envelope(float frequency); typedef enum { default_voice, butts_fader, octave_crunch } voice_type; void set_voice(voice_type v); #endif