In 1999, version 3.0 (12 September 1999) was released, with a new "fast mode" (albeit with reduced compression ratio), compression of raw (headerless) PCM audio files, and error detection using a 32-bit cyclic redundancy check.Ī feature added in late 3.x versions is the "hybrid" mode where the encoder generates a lossy file and a correction file such that both can be decompressed back to a PCM stream that is same quality as the original.
2.0 (2 September 1998) was released, featuring lossy encoding (using only quantization of prediction residue for data reduction - no psychoacoustic masking model was applied to the stream). Very soon after the release of version 1.0, v. This first version compressed and decompressed audio losslessly, and it already featured one of the best efficiency vs. Can encode in both symmetrical and asymmetrical (slower encoding to speed up decoding) modesĭavid Bryant started development on WavPack in mid-1998 with the release of version 1.0 ().Includes MD5 hashes for quick integrity checking.Ability to create self extracting files for the Win32 platform.Metadata support ( ID3, APE tags) (APE tag is the preferred format.).Hardware support (provided by Rockbox firmware).Native support in WavPack 5.x for compressing Direct Stream Digital without converting the source file to PCM.Supports multichannel audio and high resolutions.Higher compression ratios than other widely used (FLAC/ALAC) open source lossless audio codecs.Open-source, released under a BSD-like license.This allows the use of lossy and lossless codecs together.Ī similar "hybrid" feature is also offered by OptimFROG DualStream, MPEG-4 SLS and DTS-HD Master Audio. WavPack also incorporates a "hybrid" mode which still provides the features of lossless compression, but it creates two files: a relatively small, high-quality, lossy file (.wv) that can be used by itself and a "correction" file (.wvc) that, when combined with the lossy file, provides full lossless restoration.
Like other lossless compression schemes, the data reduction rate varies with the source, but it is generally between 30% and 70% for typical popular music and somewhat better than that for classical music and other sources with greater dynamic range. It also supports surround sound streams and high frequency sampling rates. WavPack compression can compress (and restore) 8-, 16-, 24-, and 32-bit fixed-point, and 32-bit floating point PCM audio files in the.
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