What the hell are YOU talking about? That whole app is the epitome of skeuomorphism. Don't you know what that term even means?
Do you lack reading comprehension? Looks like you don't know what the term means.
I said the interface could be updated, yes; get rid of the wood and all that crap. But it would be plain silly to replace instrument in an app which purpose is to make music. That has absolutely nothing to do with skeuomorphism.