Advantages and disadvantages when you convert audio file to MPEG
I recently bought some songs/ music from iTunes store, which have AAC files. I’m thinking of converting the audio files to MPEG format but I somehow have second thoughts if mpeg is the right format. I mean, if I convert audio file to mpeg, will I get the same quality or can I convert it back to AAC or other audio files just in case I change my mind? What are the advantages and disadvantages of converting audio files to mpeg?