From CCRMA Wiki
Soundcards at CCRMA
All Linux workstations at CCRMA are equipped with high quality soundcards. There are currently three different models of soundcards in use.
This card from Midiman is regretfully discontinued. A PCI basic soundcard (the Midiman Delta 66 - http://www.m-audio.com/products/en_us/Delta66.html - without its line level breakout box) is combined with a special breakout box (the Midiman OmniI/O - -) to provide a lot of flexibility.
This is most prevalent soundcard, almost all machines have one of these. It is a PCI card (the Midiman Delta 66) connected to a breakout box and mixer (the Midiman OmniI/O). The breakout box has two front panel line level or mic level inputs with volumen and pad controls, effects send for all four channels, one hard wired headphone and one headphone jack (with independent levels) and one master monitor volume that controls the main stereo output.