Who better to post on April Fool's Day?
Frank Zappa is the king. I've pledged my undying allegiance to his genius ever since I was a young man, which, come to think of it- is exactly why he still appeals to me; the scatological humor, the whole anti-establishment vibe, his politically incorrectness, his supreme guitar work...
Lumpy Gravy was Zappa's first album without The Mothers moniker, and it's a pastiche of conversations with his band (inside a piano), found sounds, tape loops, splices, etc. A freaky piece of experimental sound collages with occasional jazz rock sprinkled about. Not for the faint of heart, and not for you serious indie rock types.