Kid3 0.5 Description:
QMBTagger is a Qt-based frontend to the MusicBrainz client library, allowing lookup and tagging of MP3, Ogg, and FLAC files by acoustic IDs. It also allows lookup of CDs based on their tables of contents. If you want to easily tag multiple MP3 files (e.g. full albums) without typing the same information again and again and have control over both ID3v1 and ID3v2 tags, then Kid3 is the program you are looking for.
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Convert MP3 to WAV; Extract audio from video files and encode to MP3 or WAV (Demo)