Once a pedal is calibrated it remains calibrated. If you disconnect it and reconnect it while the H9 is on, however, pedal recalibration is necessary and is as easy as rocking the pedal back and forth. For optimum results, always connect to your expression pedal first before connecting to H9. It’s also better to connect to the H9 before powering on if the pedal has previously calibrated.
thanks. What do you mean by connecting to your expression pedal first? My expression pedals need no connecting since they don’t have input or output. I always leave the expression pedal cable in the H9.