I have tested my babyface out on an old HP laptop and it works great, but the same test on a brand new macbook pro resulted in all of the audio on the computer sounding like chipmunks (increased speed, pitched up).  I have set the babyface to be the default input and output for sound on the macbook, as well as to play system sounds through it (which I believe have then been disabled entirely, as recommended by a few people on here).  I don't understand why an old laptop would work fine, but a macbook wouldn't.  Also, as far as I can tell all drivers are up to date on both the pc and the macbook.  Thanks guys!