Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Recently I had a chance to put my hands on Lexicon Alpha usb recording interface and I must say I was surprised to discover that it works out of the box with Linux. I couldn't find any compatibility information for it, except for this post, and still, Lexicon Alpha was purely plug-and-play device with my Ubuntu Studio 9.10 netbook.
Inputs And Outputs
Lexicon Alpha offers one instrument input, one microphone input, and two line inputs. Unfortunately, mic input has no phantom power, but if you can live without using condenser microphones, it's not much of a problem. Inputs are arranged into two channels, so you can record two tracks simultaneously. Line1 is combined with instrument input as Channel 1, and Line 2 is combined with mic input as Channel 2. Thanks to that, you can record external stereo source, mic+guitar or mic/guitar with external source - quite a lot of possibilities for a low-end audio interface.