Software Update: FLAC 1.3.1

After a year and a half of silence, a new version of the Free Lossless Audio Codec, or FLAC, has appeared. This sound file format stores data without losing any information, as is the case with mp3, Ogg Vorbis and Opus, for example. FLAC is available for various operating systems and usually requires an external program to serve as a user interface. In Windows, for example, this is possible with ExactAudioCopy and foobar2000. Although a long time has passed, the changelog shows no major changes.


  • Improved decoding efficiency of all bit depths but especially so for 24 bits for IA32 architecture.
  • Faster encoding using SSE and AVX.
  • Fixed bartlett, bartlett_hann and triangle functions.
  • New apodization functions partial_tukey and punchout_tukey for improved compression
  • Retuned compression presets to incorporate new apodization functions.
  • Fix -Wcast-align warnings on armhf architecture.


  • Help output documentation improvements.
  • I/O buffering improvements on Windows to reduce disk fragmentation when writing files
  • Only write vorbis comments if they are non-empty.


  • Fix symbol visibility in XMMS plugin.

build system:

  • Many fixes and improvements across all the build systems.



  • Fix CVE-2014-9028 (heap write overflow) and CVE-2014-8962 (heap read overflow)

Version number 1.3.1
Release status Final
Operating systems Windows 7, Linux, BSD, Windows XP, DOS, macOS, Solaris, UNIX, Windows Vista, Windows 8
Website FLAC
License type GPL