     // TODO: attach GT3 to hardware clock isr that sets clock to EXT
     gt_attach_interrupt(GT3, clock_isr, CHANGE);
     gt_attach_interrupt(GT4, reset_isr, RISING);
-
   }
 
   virtual void loop()


volatile uint8_t stage, step;
volatile bool gate, clock_gate, retrigger, reverse;

void clock_isr();
void reset_isr();

    {
      params.vals.slew_rate = 8;
    }
    seq_values.slew_hz = slew_hz(params.vals.slew_rate);
    slew_filter->set_frequency(seq_values.slew_hz);

    if(params.vals.clock_bpm < 0 || params.vals.clock_bpm > 99)
    {
