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<h2>
<span class="refentrytitle">trigseq</span>
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<p>trigseq —
Accepts a trigger signal as input and outputs a group of values.
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<div class="refsect1" title="Description">
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<h2>Description</h2>
<p>
Accepts a trigger signal as input and outputs a group of values.
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>trigseq</strong></span> ktrig_in, kstart, kloop, kinitndx, kfn_values, kout1 [, kout2] [...]</pre>
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<div class="refsect1" title="Performance">
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<h2>Performance</h2>
<p>
<span class="emphasis"><em>ktrig_in</em></span> -- input trigger signal
</p>
<p>
<span class="emphasis"><em>kstart</em></span> -- start index of looped section
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<p>
<span class="emphasis"><em>kloop</em></span> -- end index of looped section
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<span class="emphasis"><em>kinitndx</em></span> -- initial index
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<th align="left">Note</th>
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<p>
Although <span class="emphasis"><em>kinitndx</em></span> is listed as k-rate, it is in fact accessed only at init-time. So if you are using a k-rate argument, it must be assigned with <a class="link" href="init.html" title="init"><em class="citetitle">init</em></a>.
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<p>
<span class="emphasis"><em>kfn_values</em></span> -- number of a table containing a sequence of groups of values
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<p>
<span class="emphasis"><em>kout1</em></span> -- output values
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<p>
<span class="emphasis"><em>kout2, ...</em></span> (optional) -- more output values
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<p>
This opcode handles timed-sequences of groups of values stored into a table.
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<p>
<span class="emphasis"><em>trigseq</em></span> accepts a trigger signal (<span class="emphasis"><em>ktrig_in</em></span>) as input and outputs group of values (contained in the <span class="emphasis"><em>kfn_values</em></span> table) each time <span class="emphasis"><em>ktrig_in</em></span> assumes a non-zero value. Each time a group of values is triggered, table pointer is advanced of a number of positions corresponding to the number of group-elements, in order to point to the next group of values. The number of elements of groups is determined by the number of <span class="emphasis"><em>koutX</em></span> arguments.
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<p>
It is possible to start the sequence from a value different than the first, by assigning to <span class="emphasis"><em>kinitndx</em></span> an index different than zero (which corresponds to the first value of the table). Normally the sequence is looped, and the start and end of loop can be adjusted by modifying <span class="emphasis"><em>kstart</em></span> and <span class="emphasis"><em>kloop</em></span> arguments. User must be sure that values of these arguments (as well as <span class="emphasis"><em>kinitndx</em></span>) correspond to valid table numbers, otherwise Csound will crash because no range-checking is implemented.
</p>
<p>
It is possible to disable loop (one-shot mode) by assigning the same value both to <span class="emphasis"><em>kstart</em></span> and <span class="emphasis"><em>kloop</em></span> arguments. In this case, the last read element will be the one corresponding to the value of such arguments. Table can be read backward by assigning a negative <span class="emphasis"><em>kloop</em></span> value.
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<p>
<span class="emphasis"><em>trigseq</em></span> is designed to be used together with <a class="link" href="seqtime.html" title="seqtime"><em class="citetitle">seqtime</em></a> or <a class="link" href="trigger.html" title="trigger"><em class="citetitle">trigger</em></a> opcodes.
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<div class="refsect1" title="See Also">
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<h2>See Also</h2>
<p>
<a class="link" href="seqtime.html" title="seqtime"><em class="citetitle">seqtime</em></a>,
<a class="link" href="trigger.html" title="trigger"><em class="citetitle">trigger</em></a>
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<div class="refsect1" title="Credits">
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<h2>Credits</h2>
<p>Author: Gabriel Maldonado</p>
<p>November 2002. Added a note about the <span class="emphasis"><em>kinitndx</em></span> parameter, thanks to Rasmus Ekman.</p>
<p>January 2003. Thanks to a note from Øyvind Brandtsegg, I corrected the credits.</p>
<p>New in version 4.06</p>
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