If you look on Disk Three, in the Features section, select "Behind the Tunes", you'll see three titles: "Too fast, too furry-ous", "Blanc Expressions", and "Merrie Melodies: Carl Stalling and Cartoon Misic". Misic? Just to be sure I unloaded the DVD player software and rebooted. Nope, still there. How did THAT get past quality control? Should be "music", in case you're wondering.
The voices of Daffy Duck and Sylvester the Cat were the same except that Daffy's voice was played slightly faster to give it a different sound.