for my enemies any song off of this album
http://www.cduniverse.com/productinf...4279&BAB=D
For me, I could deal with Mozart's 5th, 2nd movement. I think having to listen to the same song for 5 hours that had words in it would drive me crazy
Maybe this song
http://en.wikipedia.org/wiki/4%2733"
John Cage 4'33"