Reading Elevator Music by Joseph Lanza. If you are interested in odd or strange music, you should get your hands on this book.

A reviewer on Amazon said this:

"He also digs up many enlightening facts--for instance, that the term canned music was coined by John Philip Souza, and that the Muzak Corporation is based in Seattle, capital of the grunge-rock movement, and the founders of the grunge record label Sub Pop once worked for it."

Listening to tri repetae++ by Autechre. Probably some of the oddest, glitch filled music ever made.