Hopefully the title makes what I'd like clear; if not, let me try to explain:
When on a PC with plenty of space, I'd prefer to listen to the higher quality FLAC files of an album rather than MP3's, given the option, however on my phone, where space is pretty limited, I'd much prefer syncing and listening to the MP3 version, given that it takes up much less space.
(forgive me if I use improper terms) What I'd like is an option to tag audio files as being the same song, but a different type of audio file (perhaps if the songs are named the same, with different file endings). When I sync my music to my phone, I'd like to be able to have an option to only sync MP3 files (when the choice is available).
Thanks for listening, and I hope that other people have the same need! I know I'd rather not put a 500 MB FLAC album on my phone that only has 3GB left.