KVRX, the University of Texas's campus radio station, has an extremely large number of artists who have dropped by their studio to play live to 2-track stereo. The performances are broadcast across the city of Austin, but you don't have to be there, you can listen on-line, Sunday nights from 10 - 11 PM (Central). Tune in to Local Live on 91.7 FM in Austin, or listen online at kvrx.org with RealPlayer.
All these performances have been made available as mp3 files, here's an example from 1998, The Magnetic Fields...
1. "I Don't Believe You"
2. "Smoke and Mirrors"
3. "All the Umbrellas in London"
4. "Aging Spinsters"