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+<!-- Copyright (C) 2017-2020  David Thompson davet@gnu.org
+
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+A copy of the license is also available from the Free Software
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+
+* Chickadee: (chickadee).     Game programming toolkit for Guile.
+
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+<title>The Environment (The Chickadee Game Toolkit)</title>
+
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+<span id="The-Environment"></span><div class="header">
+<p>
+Previous: <a href="The-Listener.html#The-Listener" accesskey="p" rel="prev">The Listener</a>, Up: <a href="Audio.html#Audio" accesskey="u" rel="up">Audio</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<span id="The-Environment-1"></span><h4 class="subsection">2.4.4 The Environment</h4>
+
+<p>The environment defines global parameters that govern how sound is
+processed within the 3D modeling space.
+</p>
+<dl>
+<dt id="index-doppler_002dfactor">Procedure: <strong>doppler-factor</strong></dt>
+<dd><p>Return the current doppler factor.
+</p></dd></dl>
+
+<dl>
+<dt id="index-speed_002dof_002dsound">Procedure: <strong>speed-of-sound</strong></dt>
+<dd><p>Return the current speed of sound.
+</p></dd></dl>
+
+<dl>
+<dt id="index-distance_002dmodel">Procedure: <strong>distance-model</strong></dt>
+<dd><p>Return the current distance model.
+</p>
+<p>Possible return values are:
+</p>
+<ul>
+<li> <code>none</code>
+</li><li> <code>inverse-distance</code>
+</li><li> <code>inverse-distance-clamped</code> (the default)
+</li><li> <code>linear-distance</code>
+</li><li> <code>linear-distance-clamped</code>
+</li><li> <code>exponent-distance</code>
+</li><li> <code>exponent-distance-clamped</code>
+</li></ul>
+
+</dd></dl>
+
+<dl>
+<dt id="index-set_002ddoppler_002dfactor_0021">Procedure: <strong>set-doppler-factor!</strong> <em>doppler-factor</em></dt>
+<dd><p>Change the doppler factor to <var>doppler-factor</var>.
+</p></dd></dl>
+
+<dl>
+<dt id="index-set_002dspeed_002dof_002dsound_0021">Procedure: <strong>set-speed-of-sound!</strong> <em>speed-of-sound</em></dt>
+<dd><p>Change the speed of sound to <var>speed-of-sound</var>.
+</p></dd></dl>
+
+<dl>
+<dt id="index-set_002ddistance_002dmodel_0021">Procedure: <strong>set-distance-model!</strong> <em>distance-model</em></dt>
+<dd><p>Change the distance model to <var>distance-model</var>.  Valid distance
+models are:
+</p>
+<ul>
+<li> <code>none</code>
+</li><li> <code>inverse-distance</code>
+</li><li> <code>inverse-distance-clamped</code>
+</li><li> <code>linear-distance</code>
+</li><li> <code>linear-distance-clamped</code>
+</li><li> <code>exponent-distance</code>
+</li><li> <code>exponent-distance-clamped</code>
+</li></ul>
+
+</dd></dl>
+
+
+
+
+</body>
+</html>