Home › Forums › Products › Stompboxes › Mission Engineering SP-H9 expression pedal AUX switch not working › Reply To: Mission Engineering SP-H9 expression pedal AUX switch not working September 14, 2021 at 8:48 pm #158654 lmcwilliParticipant Went back to firmware v 5.4.1(7). Result Toggle Tuner and Performance Switch AUX settings work. Next, I’ll try v5.6.0(0) and see if it works.
