He always used FLAC (the default compression level 5), he has literally "gone large" to level 0, uncompressed FLAC. The only compatability problem we've encountered was someone's WAV tags going AWOL. He was convinced WAV sounded better. A couple of friends and I could hear no difference to FLAC through a £70K system. If someone else prefers AIFF, or WAV, great, they have a choice.