[WinZIP 11.0 beta] now also has a special algorithm to compress .wav files!. Research done by Guillermo Gabrielli shows the audio compressor used for this is WavPack (using Lossless, High compression mode).
posted: 10/20/2006 02:36 PM>winzip v11.0 beta is out ..The audio compressor is WAVPACK. The WinZip 11 archives can be decoded with WVUNPACK (Wavpack decoder). According to WVUNPACK -ss (Super Summary) it's using Lossless High compression, but no Extra:WVUNPACK -ss MWZ.zipWVUNPACK Hybrid Lossless Audio Decompressor Win32 Version 4.31 2005-12-10Copyright © 1998 - 2005 Conifer Software. All Rights Reserved.file name: MWZ.zipfile size: 27780736 bytessource: 16-bit ints at 44100 Hzchannels: 2 (stereo)duration: 0:03:53.11modalities: lossless, highcompression: 32.44%ave bitrate: 953 kbpsencoder version: 4
Is it true and if so legal?
The main differences between the two licenses is that revised BSD licenses are permissive while the GPL is copyleft. The GPL requires the software to always be free, including derivative works, by requiring the software to always be licensed under the GPL. The BSD license only requires acknowledging the original authors, and imposes few restrictions on how the source code may be used. As a result, BSD code can become proprietary software. For instance, parts of Mac OS X and the IP stack in Microsoft Windows are derived from BSD-licensed software.
Eh? So it creates files with an extension of .zip, yet which are in WavPack format?
However foobar2000 cannot play the files.
It is indeed perfectly legal. Are they crediting "Conifer Software" somewhere? That's the only meaningful requirement in the license.
Zip .wav Music FilesA special algorithm will compress .wav files smaller than ever.
Hehe... now that you mentioned it. It's interesting that WavPack isn't mentioned anywhere on their website or the documentation that comes along with the software... instead we can read stuff like this:QuoteZip .wav Music FilesA special algorithm will compress .wav files smaller than ever.Also the MS help files that come along with the Packer don't acknowledge WavPack or its creator at all. You can check for yourself. Just in case they silently add the Acknowledgement, the MD5 of the installer is: D0AE7158522F12E20953F1C88D1A9CCC (wz110beta.exe - Build 7291)
Zip .wav Music FilesWhen you select our Best Compression Method, we use a new compression algorithm for lossless compression of .wav files. A must-have for music lovers who don't want to compromise the file integrity or sound quality.
Imho this new approach of WinZip would work best for game lovers when they compress some kind of a game ISO image, so called mix-mode, which consists of track1.iso+track2.wav+track3.wav+...
The BSD license obviously allows them to use the code if they include the copyright notice somewhere in their distribution.
However, also according to the license, they're not supposed to use my name (or perhaps even the name "WavPack") to endorse or promote their product without my permission.
Of course, if it turns out to be a "buggy" implemention of WavPack, I'd rather not have everyone knowing where it came from!
Which begs the question: does Winzip actually search for pcm algorythms when using the wavpack compression, or will it only use wavpack when it encounters a wav file? Because if it actually compresses based on code and not file header/extension, it could be a powerful tool for zipping bin/cue images with audio tracks (raw pcm).
so it's based on extensions.
Which leads me to the question... have you tried the opposite? The result might be interesting.
Quote from: bryant on 24 October, 2006, 02:16:18 AMHowever, also according to the license, they're not supposed to use my name (or perhaps even the name "WavPack") to endorse or promote their product without my permission.Ah, so this explains the fact that Wavpack wasn't mentioned anywhere. In fact they neither said it was yours nor it was theirs. Then I take back all my allegations I made before concerning selling it as their own. Because that's probably not going to happen...
WinZIP contacted me early today before I was even able to send off an e-mail. They have no plans to ignore the license and wanted to get my permission to credit me publicly. So, all is fine.Now I just need to test their implementation.