As described in the Xenyx 1002 post, I needed to be able to rout a single audio channel to the audio input of my Terratec Phase 22. I needed the smallest mixer with sub outs or alt outs that I could find. The Xenyx 1204USB seemed to be that one.
I bought it new from thomann.de.
Now, I can place a channel in the main mix or in the alt 3-4 outputs. The 3-4 outputs are routed to the Terratec Phase 22 inputs. The main mix goes nowhere.
However, the main mix and the alt 3-4 outs are monitored in the monitor channel, which is conneted to my loudspeakers. They're just a Logitech PC "2.1" system but I'll get real monitors at a later time. No rush with them. I have no room for them anyway and I can use headphones :)
Anyway, now I can play live on any synth or sing, while listening to audio from the PC and record only the desired channel. Excellent :)
It has replaced my Xenyx 1002 and is now sitting on top of my PC tower case.