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Updated README notes for release 1.8.0

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<h1>SoundTouch audio processing library v1.7.2 (developing)</h1>
<p class="normal">SoundTouch library Copyright © Olli Parviainen 2001-2013 </p>
<h1>SoundTouch audio processing library v1.8.0</h1>
<p class="normal">SoundTouch library Copyright © Olli Parviainen 2001-2014</p>
<hr>
<h2>1. Introduction </h2>
<p>SoundTouch is an open-source audio processing library that allows
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<h3>1.1 Contact information </h3>
<p>Author email: oparviai 'at' iki.fi </p>
<p>SoundTouch WWW page: <a href="http://www.surina.net/soundtouch">http://www.surina.net/soundtouch</a></p>
<p>SoundTouch WWW page: <a href="http://soundtouch.surina.net">http://soundtouch.surina.net</a></p>
<hr>
<h2>2. Compiling SoundTouch</h2>
<p>Before compiling, notice that you can choose the sample data format
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<hr>
<h2>5. Change History</h2>
<h3>5.1. SoundTouch library Change History </h3>
<p><b>1.7.2 (under work):</b></p>
<p><b>1.8.0:</b></p>
<ul>
<li>Added support for multi-channel audio processing
<li>Added support for multi-channel audio processing</li>
<li>Added support for <b>cubic</b> and <b>shannon</b> interpolation for rate and pitch shift effects besides
the original <b>linear</b> interpolation, to reduce aliasing at high frequencies due to interpolation.
Cubic interpolation is used as default for floating point processing, and linear interpolation for integer
processing.</li>
<li>Fixed bug in anti-alias filtering that limited stop-band attenuation to -10 dB instead of <-50dB, and
increased filter length from 32 to 64 taps to further reduce aliasing due to frequency folding.</li>
<li>Performance improvements in cross-correlation algorithm</li>
<li>Other bug and compatibility fixes</li>
</ul>
<p><b>1.7.1:</b></p>
<ul>
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$Id$ -->
<p>
<i>RREADME.html file updated on 28-Dec-2012</i></p>
<i>RREADME.html file updated on 7-Jan-2014</i></p>
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