Listening to the Composers in Person series on EMI. These are fascinating historical performances by composers either playing or conducting their own music. I had two of these, which I bought when they came out, but I found a box set that has all twenty-two of them that I got REALLY cheap. The sound, of course, is mostly archival, since many of these recordings are from the late 1920s and early 1930s. But fascinating to hear Bartok playing his piano pieces.