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 October 18, 2021 at 5:15 pm #159554 mmperry1Participant Same problem with Mission Engineering SP-H9 expression pedal AUX switch not working using Firmware: 5.9.0. Had to revert to 5.8.5 to get it to work. Let us know when minor update is available… thanks!
