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Readme.htm
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<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Matlab Software for Synthesis of Auditory Chimeras</title>
</head>
<body>
<p align="center"><b><font size="5">Matlab™ Software for Synthesis of Auditory
Chimeras</font></b></p>
<p> </p>
<p>You can easily create your own auditory chimeras using Matlab software.
Matlab is a higher-level language for computation and visualization
developed by <a href="http://www.mathworks.com/">The Mathworks.</a> The
Winzip archive contains Matlab functions for creating chimeras from original
sounds stored as WAV files. Once you have unzipped the archive, start
Matlab and run the functions.</p>
<p>The main function is "make_band_chimeras", which takes two WAV
files as inputs, creates pairs of chimeras for any number of frequency bands,
and stores the results in uniquely-named WAV files. Type <font face="Courier New">help
make_band_chimeras </font>at the Matlab prompt for usage information. For
eaxample, <font face="Courier New">make_band_chimeras('speech', 'music', [1 8
32]) </font>will synthesize pairs of auditory chimeras with 1, 8 and 32 bands
from the WAV files <font face="Courier New">'speech' </font>and<font face="Courier New">
'music'.</font></p>
<p>Once you have created auditory chimeras, you can listen to them using the
Matlab function "play_chimera". Type <font face="Courier New">help
play_chimera </font>at the Matlab prompt for usage.</p>
<p>The core function which performs the computations is "multi_band_chimera"
(which is called by "make_band_chimeras"). This function splits
the input sounds into frequency bands, separates the envelope and the fine time
structure in each band using Hilbert transforms, and then exchanges the
envelopes and fine structures of the two sounds.</p>
<p>Also included (and used by "make_band_chimeras") are utilities for
creating filter banks and synthesizing noise having the same power spectrum as
any given sound.</p>
<p>Software © Bertrand Delgutte, 1999-2000.</p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
</body>
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