9. WAV format which is uncompressed, it seems Needless to say, in the APE is not popular, when, WAV audio perfectionist who has always been the first choice, even now, if you want to make high-quality music, WAV is also no substitute for intermediates.

10. RM RM is already yesterday's story, nothing new, low-Bitrate ratio, but WMA, High Bitrate ratio, however MP3, although the new RM into the ATRAC3 algorithm, but the tide has been set it is difficult to make a comeback in.