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Teenage Engineering’s Pocket Operator Series has gotten some good press and with good reason, they’re awesome. However, I’ve had a bit of a struggle backing up my PO-33 K.O! with my laptop or phone, until today.
The key problem seems to be that the phone and laptop headset jacks (TRRS) only have mono microphones, and the data transmitted by the PO-33 is in stereo.
Riffing off a Reddit post that uses different equipment, here’s how it works.
The cable on the left side plugs into the USB C of my OnePlus 6T phone (disconnected to take the picture). The phone recognizes the sound card (silver box) as a headset and supplies power to it. The PO-33 on the right side (looks like a calculator) sends output through the y-cable into two mono cables. These two mono cables go into the right/left microphone ports of the sound card. The red/ring of the y-cable goes into the right microphone port. The left side of the PO-33 is for input back from the soundcard. Since the input is a stero headset signal, a single stereo cable works.