pocket operator, what is the audio output/jack? May 22, 2019 07:20 Updated 3.5mm stereo (TRS) it is, such as the one presented on our web store. Related articles pocket operator - how do i synchronize using PO sync? [video] pocket operator - where can i find the user guides? pocket operator - what is write mode? pocket operator - how do i turn it off? how do i play different notes/sounds?