Unfortunately, mine is unusable as an Audio Interface. Clicks and pops to the point of not being able to really use it. If they can't fix it, mines going back. Itunes, any type of media, same issue. Almost sounds like a clock issue, and I've tried many settings, but nothings helped so far. Surprising really given that technology is about as mature as it gets.
Latest firm ware, and full update on the MAC.
mcoffey