Aki Härmä and Matti Karjalainen
Sept. 15, 2000 - Feb 11, 2009
Note (Feb 2009)! A bug that appeared in WFIR filtering when wfilter.c (in directory /source) was compiled to mex with certain C-compilers has been corrected. New precompiled versions of wfilter.mex for recent Matlab versions are available in directory /precompiled_2009 for Windows (wfilter.mexw32, tested on XP) and Mac OSX (wfilter.mexmaci, Intel Macsonly).
Note (Jan 2008)! Users of Matlab 7.1 or later for Windows, please see this reference if/when having problems with mex-files (Thanks to Benoit Burette for pointing this out).
If you need more information about frequency warping browse to our publications page http://www.acoustics.hut.fi/publications/papers.html, where you can find several papers about the topic. In particular, many of the design examples in this toolbox are related to experiments reported in  and .
WarpTB consists of a basic toolkit and a set of optional examples and sub-toolkits for specific applications. The toolbox is free and it is available at http://www.acoustics.hut.fi/software/warp.
Copyrights: Aki Härmä and Matti Karjalainen, Helsinki University of Technology, Department of Signal Processing and Acoustics (former Laboratory of Acoustics and Audio Signal Processing), Espoo, Finland.
The Matlab functions of the toolbox are available here. The (original, not updated) package can also be downloaded as a GZipped Tar file, Tar file, or zip-file.
Basically, gunzip and untar (or unzip) the package, compile the MEX files, set MATLAB's path and use. (Original) precompiled versions of MEX files for Linux and Windows are also available here. Bug-corrected new precompiled versions are available here.The functions included in the current version can be seen by saying:
>> help WarpTB
A number of demonstrations can be found from 'examples' directory.