void step_edit_beat_sync ();
void step_edit_bar_sync ();
int step_add_bank_change (uint8_t channel, uint8_t bank);
int step_add_program_change (uint8_t channel, uint8_t program);
int step_add_note (uint8_t channel, uint8_t pitch, uint8_t velocity,
void step_edit_beat_sync ();
void step_edit_bar_sync ();
int step_add_bank_change (uint8_t channel, uint8_t bank);
int step_add_program_change (uint8_t channel, uint8_t program);
int step_add_note (uint8_t channel, uint8_t pitch, uint8_t velocity,