Shoot. I have an abundance of audio interfaces. A Zoom H6, iConnect Audio 2+, an Analog 4, and the big daddy Liquid saffire 56. Pretty much everything’s an audio interface these days.
Maybe check out a used Zoom H4? plug stereo into the inputs and connect that via USB into your computer? small and portable and usb powered. Pretty old, too- so it should be pretty cheap!
I need multi-tracking myself. So I would only be able to fully utilize the midi sequencing of the DT and get frustrated by it’s comparable audio recording capabilities.
Edit: Actually- can’t you get a 2xMono to 1/8th " cable and record line in to your computer? I’m not an audio expert, but I can’t logically determine how that would hinder the audio