If I plug one it my Xtren et8000 it is recognized as a USB Audio device (but that just means there is an entry in a usb device list somewhere) but there is no driver for it.I have pretty generic USB sound cards - one is a Creative Labs 2ch, the other a Chinese 5.1. I just wondered in principle if one would work?
I'll bring a USB sound card from UK to France next time and try.