If it screwed up some bits you would have a useless memcpy and your applications wouldn't work, but as far as audio is concerned you have the additional problem that, unlike what audiophiles believe, it's not like those bits would always be the least significant bits.. it could as well be the most significant bit and anything in between, in other words you would get crazy horrible sound squeaks and not subtle changes in stage perception or whatever it is the audiophiles are talking about presently.