Mp3tag kan op een eenvoudige manier de metadata van audiobestanden aanpassen. Ondersteuning voor onder andere Vorbis Comments, id3- en apev2-tags is aanwezig. Daarnaast kan het ook de ingesloten cover art aanpassen, de artiest en de titel via de online database van freedb of Amazon opzoeken en kunnen playlists automatisch aangemaakt worden. De ontwikkelaars hebben even geleden versie 2.43 met de volgende aankondiging naar buiten gebracht:
Version 2.43:
This version comes with support for automatic updates, improved layout of the Tag Panel, improved support for Apple Lossless (ALAC), and many other new features, changes and bugfixes.
New:Changed:
- added support for ALAC (Apple Lossless Audio Codec) information fields (bitrate, codec, ...).
- added functions SayNextNumber, SayNextWord, SayNewline, SayRegexp und Unspace for Web Sources Framework.
- keyboard shortcuts Ctrl+Tab and Shift+Ctrl+Tab for fast navigation between sub-windows.
- added mappings for WM/AlbumSortOrder, WM/ArtistSortOrder, and WM/TitleSortOrder for WMA tags.
- more size-efficient layout of Tag Panel in horizontal mode.
- option to hide the directory switcher from the Tag Panel.
- notification dialog if files referenced in a playlist cannot be read.
- support for %_total_files% in SearchBy part of Web Sources.
- option to check for updates on program startup.
- function sayuntilml for web sources framework.
Fixed:
- Ctrl+A in Tag Panel edit fields now selects all text.
- renamed PERFORMERSORTORDER to ARTISTSORTORDER.
- Genre field at 'Options > Tag Panel > Default values' now editable.
- internal undo buffer gets reset when changing directories now.
- improved performance at creating local freedb indexes.
- year field now accepts input longer than 4 characters.
- extended list of default columns for initial installations.
- extended fields Album Artist, Composer, and Discnumber are now displayed in Tag Panel (see 'Options > Tag Panel' for configuration).
- updated discogs tag source.
- column presets are now stored in %APPDATA%\Mp3tag\data\columns.
- consistently removing empty tag fields when saving tags now.
Languages:
- action 'Format value' with $regexp resulted in duplication of existing dollar signs in value.
- text in Tag Panel fields was always selected if panel was resized.
- aspect ratio was not kept when displaying cover art that exceeded the size of the cover art window.
- overflow at total size in status bar for large archives.
- fixed several issues with handling multiple values for WMA tag fields.
- minor UI glitch with line cursor at Tag Sources menu.
- preview at 'Text file - Tag' ignored blank lines.
- TVEPISODE and TVSEASON set by iTunes were not read.
- some genres from the extended list of ID3v1 genres were not allowed as standard genres in MP4 tags.
- column presets were not included in backup via 'File > Save configuration'.
- improved error handling for 0 bytes sized files.
- improved error handling for broken APIC frames.
- runtime error while trying to read empty ID3v2 UFID frames.
- lost keyboard focus after removing last cover via extended tag dialog.
- Hebrew language file.
- Danish language file.
- Ukrainian language file.
- Vietnamese language file.