Kid3

Kid3 is an application for editing metadata in audio files. It allows managing ID3, Vorbis, APE, and MP4 tags in multiple file formats. The tool facilitates the organization of music collections through batch editing and automation.

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• Editing ID3v1 and ID3v2 tags. Kid3 provides complete capability to modify all fields of ID3v1.1, ID3v2.3, and ID3v2.4 tags. Users can edit standard elements such as title, artist, album, track number, genre, and year. The interface displays both tag types simultaneously for comparison and precise management.
• Conversion between tag formats. The function converts tags between ID3v1.1, ID3v2.3, and ID3v2.4. This process preserves the musical data during transformation. Conversion is necessary for compatibility with different players and systems.
• Support for multiple audio formats. The program works with MP3, Ogg/Vorbis, FLAC, MPC, MP4/AAC, MP2, Speex, TrueAudio, WavPack, WMA, WAV, and AIFF files. Each format retains its specific metadata structures during editing.
• Batch editing of files. Allows applying tag changes to groups of files simultaneously. Common fields like artist, album, year, or genre can be defined once for an entire folder or selection. Reduces time for extensive collections.
• Tag generation from filenames. Extracts music information from patterns in filenames. Users define custom formats that map parts of the filename to specific fields. Example: "01 - Song.mp3" can assign "01" to the track number and "Song" to the title.
• Filename generation from tags. Renames files based on existing tag data. Customizable patterns control the resulting structure. Maintains consistency in the file system.
• Importing data from music databases. Retrieves metadata from gnudb.org, TrackType.org, MusicBrainz, Discogs, Amazon, and other sources. Searches for albums by identifiers or queries. The imported data covers complete album information.
• Exporting tags to various formats. Saves metadata as CSV, HTML, playlists, Kover XML, and other structured formats. Facilitates backups, analysis, and external processing of music data.
• Editing synchronized and unsynchronized lyrics. Allows adding song texts with or without timestamps. Synchronized lyrics require timing specification for each line. The compatible format is Lyrics3v2 for ID3v2.3.
• Text transformation and normalization. Applies case conversions, string replacements, and cleaning operations to selected fields. Actions include capitalization, removal of extra spaces, and character substitution.
• Creating directories from tags. Organizes files into folder structures based on metadata. Patterns utilize fields like artist, album, or genre. The function physically moves files to the new organization system.
• Generating playlists. Creates M3U, M3U8, PLS, and XSPF files from the current files. Playlists can include absolute or relative paths. The file selection determines the content of the generated list.
• Editing cover art and embedded images. Allows adding, extracting, and removing cover images from files. Supports multiple image formats and cover types. Images are embedded directly into the audio file.
• Comparing and synchronizing tags. Shows differences between tags of multiple files. Allows copying values between tracks for uniformity. Synchronization adjusts specific fields across an entire selection.
• Scripting and automation with QtScript. Offers an interface to execute custom scripts that automate complex tasks. Scripts access the program's internal API. Extends functionality beyond standard tools.

Kid3 was created by Urs Fleisch. Development began in the year 2003. The program is primarily written in C++ using the Qt framework for the graphical interface. The application is maintained by developers from the KDE community. Initial versions focused on ID3 tags for MP3 files. Support for additional formats and batch editing functions were incorporated in later versions.

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