Because I had never heard of this avant-garde composer Stockhausen, I listened to him for a good hour or so. At first I thought "What's this? This isn't really music. It's just sounds." But if you do listen for a bit, you find yourself doing just that. Perhaps it's just the sheer unpredictability and randomness of it that keeps your ear tuned. Then your ear tries to identify sounds, it tends to want to seek out something familiar. A lot of it reminded me of sound tracks in movies (unidentifiable but familiar) and at one point I was sure I heard Jimi Hendrix tuning his guitar in the background :-) Now that guy could make some awesome sounds with a guitar. In fact, he made sounds that could easily be described as sferic, tweeky & whistleresque :-)