I have found a few sites that offer FLAC files and might buy from them if there is no loss when converting to AIFF. I use the AX to stream from my MBP and am very happy with the quality I get from the lossless AIFF and ALAC files. I know both FLAC and AIFF are lossless. When converting a lossy MP3 file to another lossy format you will lose quality. Does the same hold true if going from one lossless format to another?