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<h2>
<span class="refentrytitle">trigseq</span>
</h2>
<p>trigseq —
Accepts a trigger signal as input and outputs a group of values.
</p>
</div>
<div class="refsect1">
<a id="idm281472877600904"></a>
<h2>Description</h2>
<p>
Accepts a trigger signal as input and outputs a group of values.
</p>
</div>
<div class="refsect1">
<a id="idm281472877599624"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>trigseq</strong></span> ktrig_in, kstart, kloop, kinitndx, kfn_values, kout1 [, kout2] [...]</pre>
</div>
<div class="refsect1">
<a id="idm281472877527752"></a>
<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
</p>
<p>
<span class="emphasis"><em>kloop</em></span> -- end index of looped section
</p>
<p>
<span class="emphasis"><em>kinitndx</em></span> -- initial index
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Note: Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Note]" src="images/note.png" />
</td>
<th align="left">Note</th>
</tr>
<tr>
<td align="left" valign="top">
<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>.
</p>
</td>
</tr>
</table>
</div>
<p>
<span class="emphasis"><em>kfn_values</em></span> -- number of a table containing a sequence of groups of values
</p>
<p>
<span class="emphasis"><em>kout1</em></span> -- output values
</p>
<p>
<span class="emphasis"><em>kout2, ...</em></span> (optional) -- more output values
</p>
<p>
This opcode handles timed-sequences of groups of values stored into a table.
</p>
<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.
</p>
<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.
</p>
<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.
</p>
</div>
<div class="refsect1">
<a id="idm281472877507656"></a>
<h2>Examples</h2>
<p>
Here is an example of the trigseq opcode. It uses the file <a class="ulink" href="examples/trigseq.csd" target="_top"><em class="citetitle">trigseq.csd</em></a>.
</p>
<div class="example">
<a id="idm281472877505800"></a>
<p class="title">
<strong>Example 1026. Example of the trigseq opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472698424616"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
-odac <span class="c1">;;;realtime audio out</span>
<span class="c1">;-iadc ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o trigseq.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
gi<span class="n">Times</span> <span class="nb">ftgen</span> <span class="mi">91</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">128</span><span class="p">,</span> <span class="o">-</span><span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">8</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">8</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span><span class="mi">1</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">16</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">16</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">16</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">16</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">16</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">16</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">16</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span><span class="mi">16</span><span class="c1">; times</span>
gi<span class="n">Seq</span> <span class="nb">ftgen</span> <span class="mi">90</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">128</span><span class="p">,</span> <span class="o">-</span><span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mf">.5</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mf">.25</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mf">.10</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="mf">.05</span><span class="p">,</span> <span class="mi">6</span> <span class="c1">;** sequence amplitude and freq-ratio bins</span>
<span class="kd">instr</span> <span class="nf">1</span>
i<span class="n">cps</span> <span class="nb">init</span> <span class="nb">p4</span>
i<span class="n">amp</span> <span class="nb">init</span> <span class="mf">.3</span>
k<span class="n">loop</span> <span class="nb">init</span> <span class="nb">p5</span>
i<span class="n">nitndx</span> <span class="nb">init</span> <span class="nb">p6</span>
k<span class="n">loop2</span> <span class="nb">init</span> <span class="nb">p7</span>
i<span class="n">nitndx2</span> <span class="nb">init</span> <span class="nb">p8</span>
k<span class="n">dur</span> <span class="nb">init</span> <span class="nb">p9</span>
i<span class="n">minTime</span> <span class="nb">init</span> <span class="nb">p10</span>
i<span class="n">maxTime</span> <span class="nb">init</span> <span class="nb">p11</span>
k<span class="n">ampratio</span> <span class="nb">init</span> <span class="mi">1</span>
k<span class="n">freqratio</span> <span class="nb">init</span> <span class="mi">1</span>
k<span class="n">time_unit</span> <span class="nb">expseg</span> i<span class="n">minTime</span><span class="p">,</span><span class="nb">p3</span><span class="o">/</span><span class="mi">8</span><span class="p">,</span>i<span class="n">minTime</span><span class="p">,</span><span class="nb">p3</span><span class="o">*</span> <span class="mi">3</span><span class="o">/</span><span class="mi">4</span><span class="p">,</span>i<span class="n">maxTime</span><span class="p">,</span><span class="nb">p3</span><span class="o">/</span><span class="mi">8</span><span class="p">,</span>i<span class="n">maxTime</span>
<span class="c1">;**ktrig seqtime ktime_unit, kstart, kloop, initndx, kfn_times </span>
<span class="c1">;ktrig seqtime 1/ktime_unit, 0, 15, 0, giTimes </span>
k<span class="n">trig</span> <span class="nb">metro</span> k<span class="n">time_unit</span>
<span class="c1">;**** trigseq ktrig_in, kstart, kloop, initndx, kfn_values, kout1 [, kout2, kout3, ...., koutN] </span>
<span class="nb">trigseq</span> k<span class="n">trig</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> k<span class="n">loop2</span><span class="p">,</span>i<span class="n">nitndx2</span><span class="p">,</span> gi<span class="n">Seq</span><span class="p">,</span> k<span class="n">ampratio</span><span class="p">,</span> k<span class="n">freqratio</span>
<span class="c1">;atrig = ktrig*10000</span>
<span class="nb">schedkwhen</span> k<span class="n">trig</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> k<span class="n">dur</span><span class="p">,</span> k<span class="n">ampratio</span><span class="o">*</span>i<span class="n">amp</span><span class="p">,</span> k<span class="n">freqratio</span><span class="o">*</span>i<span class="n">cps</span>
<span class="c1">; schedkwhen ktrig, -1, -1, 2, 0, ktrig, kampratio*iamp, kfreqratio*icps</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">2</span>
i<span class="n">cps</span> <span class="nb">init</span> <span class="nb">p4</span>
i<span class="n">amp</span> <span class="nb">init</span> <span class="mf">.2</span>
k<span class="n">loop</span> <span class="nb">init</span> <span class="nb">p5</span>
i<span class="n">nitndx</span> <span class="nb">init</span> <span class="nb">p6</span>
k<span class="n">loop2</span> <span class="nb">init</span> <span class="nb">p7</span>
i<span class="n">nitndx2</span> <span class="nb">init</span> <span class="nb">p8</span>
k<span class="n">dur</span> <span class="nb">init</span> <span class="nb">p9</span>
i<span class="n">minTime</span> <span class="nb">init</span> <span class="nb">p10</span>
i<span class="n">maxTime</span> <span class="nb">init</span> <span class="nb">p11</span>
k<span class="n">ampratio</span> <span class="nb">init</span> <span class="mi">1</span>
k<span class="n">freqratio</span> <span class="nb">init</span> <span class="mi">1</span>
k<span class="n">time_unit</span> <span class="nb">expseg</span> i<span class="n">minTime</span><span class="p">,</span><span class="nb">p3</span><span class="o">/</span><span class="mi">8</span><span class="p">,</span>i<span class="n">minTime</span><span class="p">,</span><span class="nb">p3</span><span class="o">*</span> <span class="mi">3</span><span class="o">/</span><span class="mi">4</span><span class="p">,</span>i<span class="n">maxTime</span><span class="p">,</span><span class="nb">p3</span><span class="o">/</span><span class="mi">8</span><span class="p">,</span>i<span class="n">maxTime</span>
<span class="c1">;**ktrig seqtime ktime_unit, kstart, kloop, initndx, kfn_times </span>
k<span class="n">trig</span> <span class="nb">seqtime</span> <span class="mi">1</span><span class="o">/</span>k<span class="n">time_unit</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">15</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> gi<span class="n">Times</span>
<span class="c1">;ktrig metro ktime_unit</span>
<span class="c1">;**** trigseq ktrig_in, kstart, kloop, initndx, kfn_values, kout1 [, kout2, kout3, ...., koutN] </span>
<span class="nb">trigseq</span> k<span class="n">trig</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> k<span class="n">loop2</span><span class="p">,</span> i<span class="n">nitndx2</span><span class="p">,</span> gi<span class="n">Seq</span><span class="p">,</span> k<span class="n">ampratio</span><span class="p">,</span> k<span class="n">freqratio</span>
<span class="nb">printk2</span> k<span class="n">trig</span>
<span class="c1">;atrig = ktrig*10000</span>
<span class="c1">; schedkwhen ktrig, -1, -1, 2, 0, kdur, kampratio*iamp, kfreqratio*icps</span>
<span class="nb">schedkwhen</span> k<span class="n">trig</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> k<span class="n">trig</span><span class="p">,</span> k<span class="n">ampratio</span><span class="o">*</span>i<span class="n">amp</span><span class="p">,</span> k<span class="n">freqratio</span><span class="o">*</span>i<span class="n">cps</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">3</span>
<span class="nb">print</span> <span class="nb">p3</span>
k<span class="n">env</span> <span class="nb">expseg</span> <span class="mf">1.04</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span><span class="mf">.04</span>
a<span class="n">1</span> <span class="nb">foscili</span> <span class="nb">p4</span><span class="o">*</span><span class="nb">a</span><span class="p">(</span>k<span class="n">env</span><span class="o">-</span><span class="mf">0.04</span><span class="p">),</span> <span class="nb">p5</span><span class="p">,</span><span class="mi">1</span><span class="p">,</span><span class="mi">1</span><span class="p">,</span>k<span class="n">env</span><span class="o">*</span><span class="mi">5</span><span class="p">,</span> <span class="mi">2</span>
<span class="nb">outs</span> a<span class="n">1</span><span class="p">,</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span><span class="mi">2</span> <span class="mi">0</span> <span class="mi">8192</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="c1">; icps unused unused kloop2 initndx2 kdur iminTime imaxTime</span>
<span class="nb">s</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">6</span> <span class="mi">100</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">5</span> <span class="mi">0</span> <span class="mf">.2</span> <span class="mi">3</span> <span class="mi">15</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">8</span> <span class="mi">6</span> <span class="mi">150</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">4</span> <span class="mi">1</span> <span class="mf">.1</span> <span class="mi">4</span> <span class="mi">30</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">16</span> <span class="mi">6</span> <span class="mi">200</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">5</span> <span class="mi">3</span> <span class="mf">.25</span> <span class="mi">8</span> <span class="mi">50</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">24</span> <span class="mi">6</span> <span class="mi">300</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">3</span> <span class="mi">0</span> <span class="mf">.1</span> <span class="mi">1</span> <span class="mi">30</span>
<span class="nb">i</span><span class="mi">2</span> <span class="mi">32</span> <span class="mi">6</span> <span class="mi">100</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">5</span> <span class="mi">0</span> <span class="mf">.2</span> <span class="mi">1</span> <span class="mi">1</span>
<span class="nb">i</span><span class="mi">2</span> <span class="mi">40</span> <span class="mi">6</span> <span class="mi">150</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">4</span> <span class="mi">1</span> <span class="mf">.1</span> <span class="mf">.5</span> <span class="mf">.5</span>
<span class="nb">i</span><span class="mi">2</span> <span class="mi">48</span> <span class="mi">6</span> <span class="mi">200</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">5</span> <span class="mi">3</span> <span class="mf">.25</span> <span class="mi">3</span> <span class="mf">.5</span>
<span class="nb">i</span><span class="mi">2</span> <span class="mi">56</span> <span class="mi">6</span> <span class="mi">300</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">5</span> <span class="mi">0</span> <span class="mf">.1</span> <span class="mi">1</span> <span class="mi">8</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472877501512"></a>
<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>
</p>
</div>
<div class="refsect1">
<a id="idm281472877498504"></a>
<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>
</div>
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>
core-release
>
by-pkgid
>
5fcfcb7517038d1f44ab4e478e6e61fa
>
files
>
3072
