flac
What is a .flac file?
audio/flac
FLAC (Free Lossless Audio Codec) compresses PCM audio losslessly, typically to about half the size of the original with no quality loss. It supports metadata tags, embedded cover art, and fast seeking. It is favored for archival and audiophile music libraries.
How to use a .flac file
Use an example FLAC to test lossless decoding, verify bit-exact round-trips against source PCM, and exercise tag parsing and transcoding to lossy formats.
Download example .flac files
- FLAC: LosslessThe clip as FLAC: free lossless audio compression. Byte-for-byte recoverable to the source PCM; for testing lossless decoders and conversion.
- FLAC with Vorbis Comments and PictureA FLAC whose STREAMINFO and audio frames are accompanied by known Vorbis comments and a 32-pixel PNG front cover.
- FLAC with Metadata StrippedThe matching FLAC reduced to STREAMINFO and the exact same audio frames, so metadata-removal tests can compare compressed essence byte for byte.
- Supplier order call: full spoken takeThe complete 22.2 second utterance at 24000 Hz mono FLAC, spoken by the af_sarah voice at 1.0x rate. The five-second excerpt in this group's ladder is cut from this take, so anything needing real duration uses this file and anything comparing damage uses the ladder. Lossless, so it is the archival reference for the whole group.
- Supplier order call: plateA 5 second excerpt of this group's take, reference. The clean five-second excerpt every other file in this ladder is scored against. Delivered as flac at 24000 Hz mono. The parameters in the specification are what the file MEASURED, not what was requested of it.
- Supplier order call: noise snr20A 5 second excerpt of this group's take, noise. Broadband noise mixed in at a measured signal-to-noise ratio, which is where a denoiser is either working or not. Delivered as flac at 24000 Hz mono. Scored against plate.flac in the same group, which is the same five seconds undamaged. The parameters in the specification are what the file MEASURED, not what was requested of it.
- Supplier order call: noise snr10A 5 second excerpt of this group's take, noise. Broadband noise mixed in at a measured signal-to-noise ratio, which is where a denoiser is either working or not. Delivered as flac at 24000 Hz mono. Scored against plate.flac in the same group, which is the same five seconds undamaged. The parameters in the specification are what the file MEASURED, not what was requested of it.
- Supplier order call: noise snr0A 5 second excerpt of this group's take, noise. Broadband noise mixed in at a measured signal-to-noise ratio, which is where a denoiser is either working or not. Delivered as flac at 24000 Hz mono. Scored against plate.flac in the same group, which is the same five seconds undamaged. The parameters in the specification are what the file MEASURED, not what was requested of it.
and 115 more in the library.