IIRC, a long time ago Apple had an option to scan your audio file collection and replace those files with files off of their iTunes library. For most people, that meant replacing low quality rips of CDs that they got off of Napster and the like, but there were audiophiles who had lossless audio files and the replacements were a downgrade in that aspect. It was a one way operation, you lost the original files once you did the conversion.
IIRC, a long time ago Apple had an option to scan your audio file collection and replace those files with files off of their iTunes library. For most people, that meant replacing low quality rips of CDs that they got off of Napster and the like, but there were audiophiles who had lossless audio files and the replacements were a downgrade in that aspect. It was a one way operation, you lost the original files once you did the conversion.