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<title>The CELT ultra-low delay audio codec: Downloads</title>
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<h1>Downloads</h1>
<p>
Keep in mind that CELT is still a work in progress. Neither the API/ABI,
nor the bit-stream are stable.
<b>Since CELT is still in development, most new releases (even minor ones) change the bit-stream, so compatibility is not preserved.</b>
Once version 1.0 is released the bitstream will be frozen and future revisions will be compatible.
Also, while we do not expect it to set your
house on fire, we cannot guarantee that it won't. So be warned! That being
said, we're interested in feedback (bug reports, feature requests, comments)
from people trying to use it.
</p>
<h2>Source code repository</h2>
<p>CELT is hosted in <a href="http://git.or.cz/">Git</a> and you can grab the latest code by typing:</p>
<p><tt>git clone git://git.xiph.org/celt.git</tt> or <tt>git clone http://git.xiph.org/celt.git</tt></p>
<p>The repository can be viewed online at <a href="http://git.xiph.org/?p=celt.git">http://git.xiph.org/?p=celt.git</a>.</p>
<h2>Latest <strong style='font-style: italic;'>development</strong> releases</h2>
<h3 id='zero.11.1'>0.11.1</h3>
<p>CELT 0.11.1 fixes two minor bugs with 0.11 that affect the bit-stream. The quality should improve (very) slightly, but not enough to be noticeable in most cases. Several Opus-related bugs have also been fixed.</p>
<ul>
<li>Source code: <a href="http://downloads.xiph.org/releases/celt/celt-0.11.1.tar.gz">celt-0.11.1.tar.gz</a></li>
</ul>
<h3 id='zero.11.0'>0.11.0</h3>
<p>CELT 0.11 introduces API changes that should be close to the final API. The bit-stream is also in "soft-freeze" meaning there is an attempt to keep it fixed, but some bugs may force changes. There are also some minor quality improvements, mostly at high bit-rate. </p>
<ul>
<li>Source code: <a href="http://downloads.xiph.org/releases/celt/celt-0.11.0.tar.gz">celt-0.11.0.tar.gz</a></li>
</ul>
<h3 id='zero.10.0'>0.10.0</h3>
<p>CELT 0.10.0 again brings many quality improvements, mostly through better bit allocation. It also fixes many bugs and regressions, most notably with VBR support. The bit-stream is <b>not</b> compatible with version 0.9.x. See <a href="http://people.xiph.org/~xiphmont/demo/celt/demo.html">Monty's CELT demo page</a> for more details on recent (and less recent) CELT development.</p>
</p>
<ul>
<li>Source code: <a href="http://downloads.xiph.org/releases/celt/celt-0.10.0.tar.gz">celt-0.10.0.tar.gz</a></li>
</ul>
<h3 id='zero.9.1'>0.9.1</h3>
<p>CELT 0.9.1 greatly improves the packet loss concealment.
This change is especially dramatic in fixed point mode. The 0.9.1 bit-stream is compatible with 0.9.0.</p>
</p>
<ul>
<li>Source code: <a href="http://downloads.xiph.org/releases/celt/celt-0.9.1.tar.gz">celt-0.9.1.tar.gz</a></li>
</ul>
<h2>Older development releases</h2>
<p>
These are older releases, provided mainly for historical reasons.
</p>
<ul>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.0.1.tar.gz">celt-0.0.1.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.0.2.tar.gz">celt-0.0.2.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.1.0.tar.gz">celt-0.1.0.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.2.0.tar.gz">celt-0.2.0.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.3.0.tar.gz">celt-0.3.0.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.3.1.tar.gz">celt-0.3.1.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.3.2.tar.gz">celt-0.3.2.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.4.0.tar.gz">celt-0.4.0.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.5.0.tar.gz">celt-0.5.0.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.5.1.tar.gz">celt-0.5.1.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.5.1.3.tar.gz">celt-0.5.1.3.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.5.2.tar.gz">celt-0.5.2.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.6.0.tar.gz">celt-0.6.0.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.6.1.tar.gz">celt-0.6.1.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.7.0.tar.gz">celt-0.7.0.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.7.1.tar.gz">celt-0.7.1.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.8.0.tar.gz">celt-0.8.0.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.8.1.tar.gz">celt-0.8.1.tar.gz</a></li>
<li><a href="http://downloads.us.xiph.org/releases/celt/celt-0.9.0.tar.gz">celt-0.9.0.tar.gz</a></li>
</ul>
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