Better later than never. Today i promoted Mussorgsky to extras-testing. Now it needs some thumbs up from the power users to get into the famous extras repo, reaching a wider audience.
If you have used it, and think it passes the Q&A checklist, please give mussorgky some karma!

Thanks for that great tool
Well I would possibly give it a try if I thought it might be useful, but as you seem to have neglected to say what it is and why I might want to use it, I haven’t.
I can’t seem to make it work, the fields do not accept any changes. Does it support aac+, mp4 or m4a files?
Rod
@Rod If the format is not supported the fields are not active. mp4 is usually video (unsupported), aac and m4a seems to be supported by mutagen (the library mussorgsky uses to write the metadata), but few lines of code are missing to make it work. Hopefully will be fixed in the next release.