You don't? Really?
Oh, well, you're probably not getting enough sleep.
Anyway, I still don't know who they are, but maybe some of the eagle-eared readers out there can identify voices from the new Ralph & Ralph track posted on their "Sounds" page. "Ralph and Ralph's Song" is a slow, loping song that Randy Newman might write and includes the following couplet, which is either a 1) biting meta-commentary on the digital music distribution process or 2) feel-good life lesson.
"A record costs money / but a song is for free."