This is an original arrangment of "Big Bottom" by Spinal Tap. It's sort of a jazz-blues -- or blues-jazz, really -- version, with layers upon layers of bass (as many as seven bass parts simultaneously).
I think this arrangement really captures the true soul of the original composition, expressing the theme as words never could; hence, the bass guitar does all of the singing.
You might not be able to hear the song well on your crummy computer speakers. Try headphones.
Created using a BOSS RC-2 LoopStation pedal, Variax Bass, and PODxt Live. The guitar models used (in order) are MiniMoog synth, Fender Jazz, Fender Fretless Jazz, Hagstrom H8 8-string, and Hamer B12A 12-string.