I still have a great number of AIFF files in my music library. I'd like to convert them to Apple Lossless, as it's the same sound quality at half the space. I know you can create a copy of any file in another format, but it sounds quite complicated. First you have to create a copy, and then you need to delete the "original" AIFF file. Can't I just convert an existing file without a copy, keeping also the play counts? Thanks.