 #define NOTE_MIN 21
 #define NOTE_MAX 108
 #define PULSEWIDTH_MIN 35
-#define PULSEWIDTH_MAX 300
+#define PULSEWIDTH_MAX 250
 
 int clamp_pulse_width(float nominal_width) {
   return (int) constrain(nominal_width, PULSEWIDTH_MIN, PULSEWIDTH_MAX);

    while (system_mode == 4) {
      read_controls();
      update_bottom_display_line();

      digitalWriteFast(channel_1_out, HIGH);
      delay_safe_micros(interrupter_pulsewidth_setpoint);

}

bool update_pulse_duty_cycle() {
  if( (old_pulse_duty_cycle_setpoint + 50) < pulse_duty_cycle_setpoint || 
      (old_pulse_duty_cycle_setpoint - 50) > pulse_duty_cycle_setpoint ) {
    old_pulse_duty_cycle_setpoint = pulse_duty_cycle_setpoint;
    return true;
  }
