Kid3

Kid3 is an open-source cross-platform audio tag editor for many audio file formats. It supports DSF, MP3, Ogg, FLAC, MPC, MPEG-4 (mp4/m4a/m4b), AAC, Opus, SPX, TrueAudio, APE, WavPack, WMA, WAV, AIFF, tracker modules.

Features

 * Edit and convert between ID3v1.1, ID3v2.3 and ID3v2.4 tags.
 * Access to all tag fields.
 * Batch edit tags of multiple files.
 * Generate tags from filenames or from the contents of other tag fields.
 * Generate filenames from tags, rename and create directories from tags.
 * Generate playlist files.
 * Automatically convert upper and lower case and replace strings.
 * Search and filter files by tags.
 * Import from gnudb.org, TrackType.org, MusicBrainz, Discogs, Amazon and other sources of album data.
 * Automatic batch import of metadata and cover art for multiple albums from different sources.
 * Import using acoustic fingerprints and AcoustID.
 * Export tags as CSV, HTML, playlists, Kover XML and in other formats.