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 23, 2021 at 7:09 pm #159739 vigneshParticipant I have the same issue. The external aux switch is no longer working with the SP-H9 with the new firmware update. I have to go back to the old firmware. Please fix the issue as soon as possible. Thanks!
