For general troubleshooting of the Grandmother, we recommend the following steps in order:


  1. Reset all GLOBAL SETTINGS 
    • Hold down the HOLD and SYNC buttons for three seconds until you see the SYNC button blinking.

    • Hold the highest black key (A#2), and while holding it press the lowest black key (F#0). You will see the three buttons on the LHC blink rapidly for a moment to confirm that the reset happened.

    • A video detailing how to perform this procedure can be found HERE.

  2. Perform a NOTE CALIBRATION
    • Hold down the HOLD and SYNC buttons for three seconds until you see the SYNC button blinking.

    • Once blinking, hold the PLAY, HOLD, and TAP buttons, and then press the lowest white key on the keyboard.

    • A video detailing how to perform this procedure can be found HERE.

  3. Perform a POT CALIBRATION 
    • Send the necessary SysEx files to the instrument via USB. You can find the necessary files and further instruction HERE.

    • A video detailing how to perform this procedure can be found HERE.

  4. Update the FIRMWARE to the latest version.
    • You can find files and instructions HERE.

    • A guide on how to send SysEx files to your synthesizer can be found HERE. 

    • A video detailing how to perform this procedure can be found HERE.