Misce-Looney-ous has posted something quite interesting. Someone on YouTube posted a version of 1952's "Rabbit's Kin" with the audio of the jabbering bunny sped down so you can hear Mel Blanc's original audio pitch.The original cartoon audio has the bunny's voice sped up so quickly, it's hard to catch what he's saying, but not anymore! Check it out here:
http://toolooney.blogspot.com/2008/09/rabbits-kin-1952-normal-speed-audio.html