People should use wavpack for archiving instead of flac, to be quite honest. It feels like FLAC has mindshare and name recognition but it doesn't support hybrid encoding (which is great for storing audio for archival and playback) or more than 8 channels of audio.
Music has 2 channels, so that feature is of no use. The other feature is cool as it avoids the need t maintain 2 sets of tags, though as far as I understand, it's not widely supported, especially in smartphones
Music absolutely uses more than two channels. Or less. You don't need special "support" either any more than flac, you just decode it and write the bytes to your output buffer.
