I'm having some issues with my AD1984. I get crackling/distortion when listening to music in itunes or songbird.. but its not constant. Usually happens at the beginning of a song, but it won't happen again after the first time. I can play a song once, then when I go to play it again there is no crackling.

I did install this new Voodoohda.kext but it doesn't seem to have fixed anything.

Edit: after reinstalling Voodoohda.kext using kexthelper all is well on the sound front. :]