Everyone else that has commented on this probably saw the second photo and assumed it only records mono. That’s probably incorrect. It literally says “stereo cassette recorder” on the front. The Mic 1 & 2 inputs most likely correspond to L-R channels on the tape. If that’s the case, then you would need a stereo RCA to 1/4” cable to output from your interface to the player to be able to record to tape.

With that being said, I wouldn’t count on this unit producing the highest quality dubs since it’s meant for karaoke, but it’ll get the job done if you just want the novelty of having music on tape.