fre:ac is a free and open source audio converter that comes with an integrated tag editor and supports various audio file formats.
Features include:
- Support for MP3, MP4/AAC, Opus, FLAC and other formats
- Integrated CD ripper with AccurateRip support
- Integrated player and tag editor
- Support for playlists, cue sheets and chapters
- Fast, multi-threaded conversion engine
- Ability to convert to multiple formats at once
- Can verify lossless input and output files
- Support for freedb/CDDB queries and submits
- Support for using command line codecs
- User interface available in 40+ languages
- Optional command line interface
Screenshots
Observed history
| App | Change | Version | When ↓ |
|---|---|---|---|
| updated | 1.1.7 | 13 Oct 2026 |
Upstream releases
Release notes supplied by the developer. These dates are not Flathub package publication times.
1.1.75 Mar 2023
New features:
- Added a tool for splitting output by various parameters (e.g. duration or number of files)
- Added support for dithering when reducing sample resolution
- Added a matrix surround decoder DSP component
- Added a volume adjustment DSP component
Improvements:
- Added support for WavPack Hybrid Lossless compression with correction files
- Added support for decoding MPEG-4 DASH files
- Added support for opening WebM audio files with the .weba extension
- Added support for downmixing 6.1 channel audio
- Added support for MusicBrainz metadata in ID3v2, MP4, Vorbis Comment and APEv2 tags
- Added support for sort order fields in ID3v2, MP4, Vorbis Comment and APEv2 tags
- Added support for rating field in Vorbis Comment, APEv2, MP4 and LIST INFO tags
- Added rating field to the tag editor
- Added optional release year column to the joblist
- Changed <disc> filename placeholder to resolve to 1 if disc number is not set
- Improved compatibility with applications writing non-compliant LIST INFO tags (e.g. Traktor)
- Added an option to use source file names as output file names if no metadata is present
- Added an option to control extraction of missing metadata from file names
- Added an option to restrict file names for reading cover art
- Added an option to disable intensity stereo phase inversion to Opus settings
- Added AccurateRip notification options for successful verification and missing database entries
- Sample rate conversion no longer converts to 32 bit float when the source rate matches the target
- Added negative exit codes to indicate errors when running freaccmd
- Added support for KDE color schemes (including dark mode)
- Improved HiDPI scale factor detection in KDE desktop environments
- Respect text scaling factor in addition to font size setting on X11 based systems
Bug fixes:
- Fixed failure (hang and abort after several seconds) to decode chapters from ALAC files
- Fixed interoperability issues of HE- and HEv2-AAC files created with FDK-AAC with foobar2000
- Fixed incorrect gapless information when creating HE- and HEv2-AAC files with FDK-AAC
- Fixed incorrect index times in cuesheets for very long multi-track files
- Fixed incorrect inclusion of data tracks in the audio track count of CD offset strings
- Fixed excessive bitrate when encoding Vorbis on non-x86 LP64 systems
- Fixed decoding of MP4 files with a single chunk taking excessively long
- Fixed HDCD detection for tracks starting with more than about one second of silence
- Fixed floating point samples being converted to integer when creating WavPack files
- Fixed inability to close cover art popup window on Linux
Updated codecs:
- Updated ALAC decoder for security fixes and improved performance
- Updated FFmpeg to version 6.0
- Updated Monkey's Audio to version 9.20
- Updated WavPack to version 5.6.0
- Updated FLAC to version 1.4.2
- Updated Speex to version 1.2.1
- Updated MP4v2 to version 2.1.2
- Updated mpg123 to version 1.31.2
- Updated libsndfile to version 1.2.0
Updated translations:
- Updated Greek translation
1.1.621 Jan 2022
New features:
- Added support for editing lyrics in the tag editor
- Added support for creating cue sheets and playlists with freaccmd
Improvements:
- Improved performance of adding video and proprietary audio files (DTS, DSD etc.) to the joblist
- Playlists can now be added to the joblist by drag & drop
- Added <tempo> and <initialkey> placeholders for use in filename patterns
- Added optional composer, conductor, tempo, musical key and ISRC columns to the joblist
- Added initial key field to tag editor
- Added support for lyrics in ID3v2, MP4, Vorbis Comment, APEv2 and WMA tags
- Added support for parsing OverDrive MediaMarkers in ID3v2 tags
- Added support for the pre-emphasis flag in cue sheets
Bug fixes:
- Fixed possible crash upon querying the CDDB database
- Fixed possible crash in FAAD2 decoder when trying to open unsupported files
- Fixed faulty decoding of certain AAC files caused by a bug in the FDK-AAC decoder
- Fixed possible faulty output when decoding from non-zero positions using external decoders
- Fixed issue ripping CD tracks when output filename pattern is <filename>
- Fixed AccurateRip reporting verification errors for hidden track one audio
- Fixed setting to replace spaces not being respected when writing cover art and log files
- Fixed setting to suppress Unicode characters not being respected when writing cover art and log files
- Fixed tag editor fields for media type, catalog number and barcode being limited to 12 characters
New and updated codecs:
- Added native Apple Lossless decoder
- Updated FFmpeg to version 5.0
- Updated Monkey's Audio to version 7.23
- Updated mpg123 to version 1.29.3
- Updated libsamplerate to version 0.2.2
New translations:
- Added Swedish and Portuguese (Brazilian) manuals
1.1.527 Jun 2021
New features:
- Added support for AccurateRip verification
Improvements:
- Added frequency bandwidth setting to FDK-AAC encoder configuration dialog
- Added an option to toggle logging of complete paths in log files
- Added options for specifying cover art files to freaccmd
- Added support for reading Shift_JIS encoded CD-Text
- Added support for writing album and track comments to cue sheets
- Added support for ID3v2 tags in RF64 files
- Added support for updating Vorbis Comment tags
- Added support for updating ID3v2 tags in RIFF and AIFF files
- Added support for updating LIST INFO tags in RIFF, RF64 and Wave64 files
- Added support for ensemble field in Vorbis Comment and APEv2 tags
- Added support for movement field in ID3v2, Vorbis Comment, APEv2 and MP4 tags
- Added support for additional URL fields in APEv2 tags
- Added a tag editor option to keep album artist even if identical to track artist
- Added media type field to tag editor
Bug fixes:
- Fixed hotspot for genre edit field utility menu not covering the whole width of the field
- Fixed occasional crashes when selecting codec subformat using the "Start encoding with" menu
- Fixed chapter marks being offset by a few seconds when using DSP processing
- Fixed playback not working when using certain combinations of DSP processors
- Fixed incompatibility of FDK-AAC encoded HE and HEv2 AAC files with iTunes
- Fixed issue decoding FLAC files with unknown length
- Fixed glitches decoding transients in some Vorbis files
- Fixed possible crashes when decoding Opus files
- Fixed rare crashes in LAME encoder component
- Fixed strings read from ID3v2 tags being limited to 1024 characters
- Fixed crash when reading malformed CD-Text genre IDs
- Fixed failure ripping with negative read offset
- Fixed UI glitches and crashes on exit when running in a Wayland session
- Fixed popup menu and dropdown list closing behavior on non-Windows platforms
- Fixed issues with custom DPI settings on Xfce desktops
- Fixed drag & drop working unreliably on X11 based systems
Updated codecs:
- Updated FFmpeg to version 4.4
- Updated Monkey's Audio to version 6.29
- Updated mpg123 to version 1.28.0
- Updated libfdk-aac to version 2.0.2
- Updated libogg to version 1.3.5
- Updated libsndfile to version 1.0.31
- Updated libsamplerate to version 0.2.1
Updated translations:
- Updated Norwegian translation
- Updated Russian manual
1.1.414 Feb 2021
Improvements:
- Improved support for reading CD-Text
- Added an HDCD decoder DSP filter
- Added catalog number and barcode fields to tag editor
- Added quality (VBR) setting to FDK-AAC configuration dialog
- Improved MP3, AAC and Opus encoding performance by up to 30%
- Improved multi-monitor support on X11 based systems
- Discs of multi-disc albums are now shown separately in tag editor album mode
- Update only changed fields when making edits in tag editor album mode
- Added support for Replay Gain values in MP4 and WMA metadata
- Do not override settings with default values when using freaccmd's --config option
Bug fixes:
- Fixed invalid length written to very long Opus and Speex files (longer than 12 ½ hours at 48 kHz)
- Fixed decoding of some very short Opus, Vorbis and Speex files
- Fixed written MP4 chapters being invisible to some applications when using Nero AAC
- Fixed hang/crash when opening WavPack, Musepack, TAK and OptimFROG files with chapters
- Fixed issues submitting CDDB information for new CDs (without existing entries)
- Fixed output sample rate being limited to 192 kHz
- Fixed freaccmd randomly failing to process files in rare cases
- Fixed bad user interface colors on some Linux distributions
Updated codecs:
- Switched from FAAC to FDK-AAC for AAC encoding
- Updated Monkey's Audio to version 6.11
- Updated WavPack to version 5.4.0
- Updated mpg123 to version 1.26.4
- Updated FAAD2 to version 2.10.0
Updated translations:
- Updated Romanian translation
- Updated Portuguese (Brazilian) translation


