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<h2>
<span class="refentrytitle">jacktransport</span>
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<p>jacktransport —
Start/stop jack_transport and can optionally relocate the playback head.
</p>
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<div class="refsect1" title="Description">
<a id="idp27925992"></a>
<h2>Description</h2>
<p>
Start/stop jack_transport and can optionally relocate the playback head.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp27952064"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>jacktransport</strong></span> icommand [, ilocation]</pre>
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<div class="refsect1" title="Initialization">
<a id="idp27953136"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>icommand</em></span> -- 1 to start playing, 0 to stop.
</p>
<p>
<span class="emphasis"><em>ilocation</em></span> -- optional location in seconds to specify where the playback head should be moved. If omitted, the transport is started from current location.
</p>
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<th align="left">Note</th>
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<td align="left" valign="top">Since <span class="emphasis"><em>jacktransport</em></span> depends on jack audio connection kit, it will work only on Linux or Mac OS X systems which have the jack server running.</td>
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<div class="refsect1" title="Examples">
<a id="idp27955304"></a>
<h2>Examples</h2>
<p>
Here is a simple example of the jacktransport opcode. It uses the file <a class="ulink" href="examples/jacktransport.csd" target="_top"><em class="citetitle">jacktransport.csd</em></a>.
</p>
<div class="example">
<a id="idp27956312"></a>
<p class="title">
<strong>Example 381. Simple example of the jacktransport opcode.</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
-+rtaudio=JACK -b 64 --sched -o dac:system:playback_
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 16
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="oblock">instr</span> 1
<span class="opc">jacktransport</span> p4, p5
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2
<span class="opc">jacktransport</span> p4
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>2 0 5 1<span class="comment">; play</span>
<span class="stamnt">i</span>2 5 1 0<span class="comment">; stop</span>
<span class="stamnt">i</span>1 6 5 1 2 <span class="comment">; move at 2 seconds and start playing back</span>
<span class="stamnt">i</span>1 11 1 0 0 <span class="comment">; stop and rewind</span>
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1" title="Credits">
<a id="idp27957336"></a>
<h2>Credits</h2>
<table border="0" summary="Simple list" class="simplelist">
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<td>Author: Cesare Marilungo</td>
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<p>New in version 5.08</p>
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