I am using an apogee JAM. Since it is only a 1 input audio interface, I’m not sending audio back to the modular but rather to my headphones. In my case, modular is more for sound generation than for sound processing.
Like @oscillateur said it is a Koma Kommander. Really fun if you know what you want to do with it, otherwise it spends a lot of time unused.
Sorry for the late reply…