What do Alvin and The Chipmunks really sound like?

We’ve all heard Alvin and The Chipmunks’ Christmas song haven’t we? Poor old Dave Seville has to yell Alvin into action at every turn, with Alvin presumably unable to tear his gaze away from all those presents under the tree. Of course, Simon and Theodore were better behaved… but y’know, easily led.
When the three get together to make a joyous helium-esque racket, it’s easy to think you’re listening to the ‘munks singin’ away… but of course you’re not. So have you ever wondered what the voices on the record were really like? What happens when you slow it waaaaaaay dooooown? Well, you’re left with three very pleasant (but normal) voices. Click over the jump to hear the original version AND ALSO hear the slowed down version.