Is the following possible, or is there a music player that has a feature like this:

I want to ADD comments to a file, as if there was a text file attached to it.
So not just give it a tag like "jazz", but put a comment like "key of Dmajor, whereas most versions are in Eb - guitarsolo TODO: transcribe - check especially the double voices in the bridge" (you get the idea).

Important would be, that if ever I move the file to another location, the text file would go along automatically.
Am I talking about something that would have to be programmed from scratch, or is it out there already somewhere?
 

OS Crunchbang Statler (Debian Linux)I'm not sure if this is any help, but for mp3 files the id3v2 tag format allows for QUITE long comments. Your comment is 127 characters long; this can easily be handled, in fact I just made a comment 4 times that length using the free editor mp3tag.

Your example comment makes me think that you might be a bit more serious about music than many mp3 users so you may like to know that the lossless FLAC format supports Vorbis tags which also allow for quite big comment fields. There are plenty of tag editors around, mostly free.

You may need to zoom the picture below to see the DETAILS clearly.

Quote from: Salmon Trout on September 10, 2011, 02:39:21 PM

I'm not sure if this is any help, but for mp3 files the id3v2 tag format allows for quite long comments. Your comment is 127 characters long; this can easily be handled, in fact I just made a comment 4 times that length using the free editor mp3tag.

Your example comment makes me think that you might be a bit more serious about music than many mp3 users so you may like to know that the lossless FLAC format supports Vorbis tags which also allow for quite big comment fields. There are plenty of tag editors around, mostly free.

I didn't find yet why it doesn't seem to want to touch FLAC, which I indeed use mostly but I can search around a bit more for similar tools.

para exampla:

EasyTAG - Tag editor for MP3, Ogg Vorbis files and more ...