Наверное, это все-таки звуковуха.
Случайно нарвался на отзыв
http://www.musiciansfriend.com/srs7/...702540/rpp=10/ , цитирую: "I got one of there with my Xenyx 1202fx board and it has proven to be a great interface for both home studio and live recording. Very simple, usb powered, and cheap enough to really put it to work. I've had this about a **** now, and mine is a little less fancy version (no headphone jack, volume knob), but the sound quality has been very good with very little noise."
Похоже, чувак описывает именно такой девайс, как и у тебя.