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-under the terms of the GNU Free Documentation License, Version 1.3
-or any later version published by the Free Software Foundation;
-with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
-A copy of the license is included in the section entitled "GNU
-Free Documentation License".
-
-A copy of the license is also available from the Free Software
-Foundation Web site at http://www.gnu.org/licenses/fdl.html.
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-* Guile-SDL2: (guile-sdl2). SDL2 bindings for Guile.
-
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-<title>Sound (Guile-SDL2)</title>
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-<span id="Sound"></span><div class="header">
-<p>
-Next: <a href="Fonts.html" accesskey="n" rel="next">Fonts</a>, Previous: <a href="Images.html" accesskey="p" rel="prev">Images</a>, Up: <a href="API-Reference.html" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html" title="Index" rel="index">Index</a>]</p>
-</div>
-<hr>
-<span id="Sound-1"></span><h3 class="section">3.10 Sound</h3>
-
-<div class="example">
-<pre class="example">(use-modules (sdl2 mixer))
-</pre></div>
-
-<dl>
-<dt id="index-_0025default_002dfrequency">Scheme Variable: <strong>%default-frequency</strong></dt>
-</dl>
-
-<dl>
-<dt id="index-_0025default_002dformat">Scheme Variable: <strong>%default-format</strong></dt>
-</dl>
-
-<dl>
-<dt id="index-_0025default_002dchunk_002dsize">Scheme Variable: <strong>%default-chunk-size</strong></dt>
-</dl>
-
-<dl>
-<dt id="index-mixer_002dinit">Procedure: <strong>mixer-init</strong> <em>[#:optional formats='(flac mod modplug mp3 ogg fluidsynth)]</em></dt>
-<dd><p>Initialize mixer library with support for <var>formats</var>, a list of
-symbols representing audio file formats. Possible formats are:
-</p>
-<ul>
-<li> flac
-</li><li> mod
-</li><li> modplug
-</li><li> mp3
-</li><li> ogg
-</li><li> fluidsynth
-</li></ul>
-</dd></dl>
-
-<dl>
-<dt id="index-mixer_002dquit">Procedure: <strong>mixer-quit</strong></dt>
-<dd><p>Shutdown mixer library.
-</p></dd></dl>
-
-<dl>
-<dt id="index-open_002daudio">Procedure: <strong>open-audio</strong> <em>[#:frequency=%default-frequency] [#:format=%default-format] [#:stereo?=#t] [#:chunk-size=%default-chunk-size]</em></dt>
-<dd><p>Initialize the mixer API. <var>frequency</var> specificies the sample rate in
-hertz. When <var>stereo?</var> is <code>#t</code>, two output channels are used, otherwise
-mono output is used instead. <var>chunk-size</var> specifies the number of bytes
-used per output sample. <var>format</var> is a symbol that specifies the output
-sample format. Possible values are:
-</p>
-<ul>
-<li> u8
-</li><li> s8
-</li><li> u16lsb
-</li><li> s16lsb
-</li><li> u16msb
-</li><li> s16msb
-</li><li> u16
-</li><li> s16
-</li><li> s32lsb
-</li><li> s32msb
-</li><li> s32
-</li><li> f32lsb
-</li><li> f32msb
-</li><li> f32
-</li></ul>
-</dd></dl>
-
-<dl>
-<dt id="index-close_002daudio">Procedure: <strong>close-audio</strong></dt>
-<dd><p>Shut down the mixer API.
-</p></dd></dl>
-
-<dl>
-<dt id="index-chunk_003f">Procedure: <strong>chunk?</strong> <em>c</em></dt>
-<dd><p>Return <code>#t</code> if <var>c</var> is a chunk.
-</p></dd></dl>
-
-<dl>
-<dt id="index-load_002dchunk">Procedure: <strong>load-chunk</strong> <em>file</em></dt>
-<dd><p>Load the audio data in <var>file</var> and return an audio chunk.
-</p></dd></dl>
-
-<dl>
-<dt id="index-delete_002dchunk_0021">Procedure: <strong>delete-chunk!</strong> <em>chunk</em></dt>
-<dd><p>Free the memory used for <var>chunk</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-set_002dchunk_002dvolume_0021">Procedure: <strong>set-chunk-volume!</strong> <em>chunk volume</em></dt>
-<dd><p>Set the loudness of <var>chunk</var> to <var>volume</var>, an integer in the range
-[0,128]. Return the previous chunk volume setting.
-</p></dd></dl>
-
-<dl>
-<dt id="index-play_002dchunk_0021">Procedure: <strong>play-chunk!</strong> <em>chunk [#:loops=0] [#:channel]</em></dt>
-<dd><p>Play <var>chunk</var> on <var>channel</var>, an integer channel identifier or <code>#f</code>
-to use the first unreserved audio channel. <var>chunk</var> will play <var>loops</var> +
-1 times. Return the channel identifier that <var>chunk</var> is played on.
-</p></dd></dl>
-
-<dl>
-<dt id="index-set_002dchannel_002dvolume_0021">Procedure: <strong>set-channel-volume!</strong> <em>channel volume</em></dt>
-<dd><p>Set the loudness of <var>channel</var>, an integer channel identifier or <code>#f</code>
-for all channels, to <var>volume</var>, an integer in the range [0,128]. Return
-the previous volume of <var>channel</var>, or the average of all channels if
-<var>channel</var> is <code>#f</code>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-pause_002dchannel_0021">Procedure: <strong>pause-channel!</strong> <em>channel</em></dt>
-<dd><p>Pause playback on <var>channel</var>, an integer channel identifier, or <code>#f</code> to
-pause all channels.
-</p></dd></dl>
-
-<dl>
-<dt id="index-resume_002dchannel_0021">Procedure: <strong>resume-channel!</strong> <em>channel</em></dt>
-<dd><p>Resume playback on <var>channel</var>, an integer channel identifier, or <code>#f</code> to
-resume all channels.
-</p></dd></dl>
-
-<dl>
-<dt id="index-stop_002dchannel_0021">Procedure: <strong>stop-channel!</strong> <em>channel</em></dt>
-<dd><p>Halt playback on <var>channel</var>, an integer channel identifier, or <code>#f</code> to
-halt all channels.
-</p></dd></dl>
-
-<dl>
-<dt id="index-channel_002dplaying_003f">Procedure: <strong>channel-playing?</strong> <em>channel</em></dt>
-<dd><p>Return <code>#t</code> if <var>channel</var> is playing.
-</p></dd></dl>
-
-<dl>
-<dt id="index-playing_002dchannels_002dcount">Procedure: <strong>playing-channels-count</strong></dt>
-<dd><p>Return the number of channels currently playing.
-</p></dd></dl>
-
-<dl>
-<dt id="index-channel_002dpaused_003f">Procedure: <strong>channel-paused?</strong> <em>channel</em></dt>
-<dd><p>Return <code>#t</code> if <var>channel</var> is paused.
-</p></dd></dl>
-
-<dl>
-<dt id="index-paused_002dchannels_002dcount">Procedure: <strong>paused-channels-count</strong></dt>
-<dd><p>Return the number of channels that are paused.
-</p></dd></dl>
-
-<dl>
-<dt id="index-music_003f">Procedure: <strong>music?</strong> <em>m</em></dt>
-<dd><p>Return <code>#t</code> if <var>m</var> is music.
-</p></dd></dl>
-
-<dl>
-<dt id="index-load_002dmusic">Procedure: <strong>load-music</strong> <em>file</em></dt>
-<dd><p>Load music from <var>file</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-delete_002dmusic_0021">Procedure: <strong>delete-music!</strong> <em>music</em></dt>
-<dd><p>Delete the memory used for <var>music</var>.
-</p></dd></dl>
-
-<dl>
-<dt id="index-play_002dmusic_0021">Procedure: <strong>play-music!</strong> <em>music [#:optional loops=1]</em></dt>
-<dd><p>Play <var>music</var>, repeated <var>loops</var> times. <var>loops</var> may be <code>#f</code>, in
-which case the music loops indefinitely.
-</p></dd></dl>
-
-<dl>
-<dt id="index-set_002dmusic_002dvolume_0021">Procedure: <strong>set-music-volume!</strong> <em>volume</em></dt>
-<dd><p>Set music loudness to <var>volume</var>, an integer in the range [0,128]. Return the
-previous volume.
-</p></dd></dl>
-
-<dl>
-<dt id="index-music_002dvolume">Procedure: <strong>music-volume</strong></dt>
-<dd><p>Return the music volume.
-</p></dd></dl>
-
-<dl>
-<dt id="index-pause_002dmusic_0021">Procedure: <strong>pause-music!</strong></dt>
-<dd><p>Puase the music.
-</p></dd></dl>
-
-<dl>
-<dt id="index-resume_002dmusic_0021">Procedure: <strong>resume-music!</strong></dt>
-<dd><p>Resume music playback.
-</p></dd></dl>
-
-<dl>
-<dt id="index-rewind_002dmusic_0021">Procedure: <strong>rewind-music!</strong></dt>
-<dd><p>Start music playback from the beginning. Rewinding is only supported for MOD,
-OGG, MP3, and native MIDI music.
-</p></dd></dl>
-
-<dl>
-<dt id="index-stop_002dmusic_0021">Procedure: <strong>stop-music!</strong></dt>
-<dd><p>Halt music playback.
-</p></dd></dl>
-
-<dl>
-<dt id="index-music_002dplaying_003f">Procedure: <strong>music-playing?</strong></dt>
-<dd><p>Return <code>#t</code> if music is currently playing.
-</p></dd></dl>
-
-<dl>
-<dt id="index-music_002dpaused_003f">Procedure: <strong>music-paused?</strong></dt>
-<dd><p>Return <code>#t</code> if music is currently paused.
-</p></dd></dl>
-
-<hr>
-<div class="header">
-<p>
-Next: <a href="Fonts.html" accesskey="n" rel="next">Fonts</a>, Previous: <a href="Images.html" accesskey="p" rel="prev">Images</a>, Up: <a href="API-Reference.html" accesskey="u" rel="up">API Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html" title="Index" rel="index">Index</a>]</p>
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