Buttons on MOD Duo X not always triggering when simultaneously using the rotary knob

Description


I have pedal boards in the MOD Duo X with normal effect plugins like e. g. paranoia distortion. I trigger the effect by holding one of the buttons on my MOD Duo X (momentary on) then i adjust a parameter by turning the rotary knob. Often the button press or release is not registered when I am simultaneously turning the knob. So the effect is either not activated when pressing the button or not stopped when releasing the knob.

When I am not turning the knob, the button presses and releases are registered flawlessly.

A similar behaviour shows when using:

  • different effect plugins with different parameters
  • different buttons or rotary knobs
  • “latching” button mode instead of “momentary on”
  • endless encoders instead of rotary knobs
  • when MOD Duo X is not connected via USB

I do not have a MOD Dwarf or MOD Duo. So i can not tell if they show a similar behaviour.

How to reproduce


  1. Create a new pedal board on the MOD Duo X in the web UI.
  2. Add any effect plugin (like paranoia distortion)
  3. Assign a button to the “on/off”-parameter of the effect. Press “Advanced” and select Mode “Momentary On”.
  4. Assign a rotary knob to a parameter (e. g. “Mangle” parameter on the paranoia distortion)
  5. Constantly turn the rotary knob left and right while simultaneously pressing an releasing the button
    → Sometimes the effect is not activated when pressing the button and sometimes the effect stays activated after releasing the button. The LED also indicates that the button has not been pressed or is still pressed after releasing.

Expected/suggested solution

I expect the LED and effect plugin to always enable when pressing and always disable when releasing the button.

Additional information


MOD Duo X

  • release: v1.13.5

  • Operating system: Ubuntu studio

  • System version: 24.04