ADC Calibration

Calibration is done by Bowl Modular.

All modules are sent out fully calibrated. You shouldn't need to re-calibrate the module, but if something seems off, you can execute the steps below to calibrate your module.

To ensure accurate knob and CV tracking, you can calibrate the analog inputs. This compensates for component tolerances in your specific build.

There are two separate calibration modes — one for the potentiometers and one for the CV inputs. Each calibrates one input at a time, with the LED next to it lighting up to show you which one to sweep.

Pot calibration

1. Hold Trigger + Random while powering on the module.
2. All LEDs blink 3 times to confirm you've entered pot calibration.
3. The Trigger LED lights up — sweep the Number of Bursts knob fully counter-clockwise, then fully clockwise.
4. Press Trigger when done.
5. The Duration LED lights up — sweep the Duration knob end to end.
6. Press Trigger when done.
7. The Regularity LED lights up — sweep the Regularity knob end to end.
8. Press Trigger when done.
9. The Random LED lights up — sweep the Gate Length knob end to end.
10. Press Trigger when done.
11. All LEDs blink 3 times to confirm calibration is saved.

CV calibration

1. Hold Duration + Regularity while powering on the module.
2. All LEDs blink 3 times to confirm you've entered CV calibration.
3. The Trigger LED lights up — patch a CV source to the Bursts CV input and sweep it through its full range.
4. Press Trigger when done.
5. The Duration LED lights up — sweep the Duration CV input.
6. Press Trigger when done.
7. The Regularity LED lights up — sweep the Regularity CV input.
8. Press Trigger when done.
9. The Random LED lights up — sweep the Gate Length CV input.
10. Press Trigger when done.
11. All LEDs blink 3 times to confirm calibration is saved.

Each step gives you unlimited time — take as long as you need to sweep. The calibration data persists across power cycles. You only need to recalibrate if you replace potentiometers or change the hardware.