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Question: How do I calibrate the pots of the Harmony-G XT?

Answer:

  1. While powering on the unit, press and hold Manual button and ON footswitch, you will see the FX light is on. 
  2. Turn the Guitar knob to the furthest LEFT position that it will travel and press FX. It should start to flash. 
  3. Turn the Guitar knob to the furthest RIGHT position that it will travel and press FX again. FX should stay on and Voice 1 should light. 
  4. Repeat steps 2 and 3 with the FX knob and Voice 1 button. 
  5. Voice 1 should stay on and Voice 2 should light. 
  6. Repeat steps 2 and 3 with the Harmony knob and Voice 2 button. 
  7. The regular display should kick in a few seconds after completing the process.