Obscure tape-loop piece by the legendary Terry Riley.
"You're Nogood" from 1968 pre-dates what is now known as 'sampling' by nearly two decades. Riley uses an obscure R&B song by Harvey Averne called "You're No Good" as the source material and turns it into a 20-minute tour-de-force by using loops, panning, phasing and Moog synthesizer sounds.