uint8_t seq_active_track = 0;
uint8_t seq_menu;
bool seq_button_r = false;
bool seq_noteoffsent = false;
elapsedMillis seq_millis_timer;
uint8_t seq_step_timer = 0;
uint32_t seq_timer_previous = 0;
bool seq_running = false;
bool seq_recording = false;
uint8_t seq_note_in;
int seq_transpose;
uint8_t seq_data[4][16] = {72, 0,  0, 0, 72, 0,  0, 0, 72, 0,  0, 0, 72, 0,  0, 0,
                           0, 0,  0, 0, 75, 0,  0, 0, 0, 0,  0, 0, 75, 0,  0, 0,
                           78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78,
                           45, 45, 57, 57, 45, 45, 57, 57, 45, 45, 57, 57, 45, 45, 57, 57,
                          };