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<h2>
<span class="refentrytitle">seqtime2</span>
</h2>
<p>seqtime2 —
Generates a trigger signal according to the values stored in a table.
</p>
</div>
<div class="refsect1">
<a id="idm281472891996680"></a>
<h2>Description</h2>
<p>
Generates a trigger signal according to the values stored in a table.
</p>
</div>
<div class="refsect1">
<a id="idm281472891995496"></a>
<h2>Syntax</h2>
<pre class="synopsis">ktrig_out <span class="command"><strong>seqtime2</strong></span> ktrig_in, ktime_unit, kstart, kloop, kinitndx, kfn_times</pre>
</div>
<div class="refsect1">
<a id="idm281472891993320"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ktrig_out</em></span> -- output trigger signal
</p>
<p>
<span class="emphasis"><em>ktime_unit</em></span> -- unit of measure of time, related to seconds.
</p>
<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_times</em></span> -- number of table containing a sequence of times
</p>
<p>
This opcode handles timed-sequences of groups of values stored into a table.
</p>
<p>
<span class="emphasis"><em>seqtime2</em></span> generates a trigger signal (a
sequence of impulses, see also <a class="link" href="trigger.html" title="trigger"><em class="citetitle">trigger</em></a> opcode),
according to the values stored in the
<span class="emphasis"><em>kfn_times</em></span> table. This table should contain a
series of delta-times (i.e. times beetween to adjacent
events). The time units stored into table are expressed in
seconds, but can be rescaled by means of <span class="emphasis"><em>ktime_unit</em></span> argument. The
table can be filled with <a class="link" href="GEN02.html" title="GEN02"><em class="citetitle">GEN02</em></a> or by means of
an external text-file containing numbers, with <a class="link" href="GEN23.html" title="GEN23"><em class="citetitle">GEN23</em></a>.
</p>
<p>
It is possible to start the sequence from a value different than
the first, by assigning to <span class="emphasis"><em>initndx</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>initndx</em></span>) correspond to valid table numbers,
otherwise Csound will crash (because no range-checking is
implementeted).
</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. It is possible to trigger two
events almost at the same time (actually separated by a k-cycle)
by giving a zero value to the corresponding delta-time. First
element contained in the table should be zero, if the user intends
to send a trigger impulse, it should come immediately after the
orchestra instrument containing <span class="emphasis"><em>seqtime2</em></span>
opcode.
</p>
<p>
<span class="emphasis"><em>seqtime2</em></span> is similar to
<a class="link" href="seqtime.html" title="seqtime"><em class="citetitle">seqtime</em></a>,
the difference is that when
<span class="emphasis"><em>ktrig_in</em></span> contains a non-zero value, current index is reset to
<span class="emphasis"><em>kinitndx</em></span> value. <span class="emphasis"><em>kinitndx</em></span> can be varied at performance time.
</p>
</div>
<div class="refsect1">
<a id="idm281472891902680"></a>
<h2>Examples</h2>
<p>
Here is an example of the seqtime2 opcode. It uses the file <a class="ulink" href="examples/seqtime2.csd" target="_top"><em class="citetitle">seqtime2.csd</em></a>.
</p>
<div class="example">
<a id="idm281472891900824"></a>
<p class="title">
<strong>Example 874. Example of the seqtime2 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="idm281472712462280"></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 realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o seqtime2.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">tabMap2</span> <span class="nb">ftgen</span> <span class="mi">57</span><span class="p">,</span><span class="mi">0</span><span class="p">,</span><span class="mi">512</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">4</span><span class="p">,</span><span class="mi">1</span><span class="o">/</span><span class="mi">4</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">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">4</span><span class="p">,</span><span class="mi">1</span><span class="o">/</span><span class="mi">4</span><span class="p">,</span><span class="mf">.5</span><span class="p">,</span><span class="mi">1</span><span class="o">/</span><span class="mi">4</span><span class="p">,</span><span class="mi">1</span><span class="o">/</span><span class="mi">4</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>
gi<span class="n">sine</span> <span class="nb">ftgen</span> <span class="mi">1</span><span class="p">,</span><span class="mi">0</span><span class="p">,</span><span class="mi">512</span><span class="p">,</span><span class="mi">10</span><span class="p">,</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">trigin</span> <span class="nb">metro</span> <span class="mf">.333333333333</span>
k<span class="n">trig2</span> <span class="nb">metro</span> <span class="mi">1</span>
<span class="nb">schedkwhen</span> k<span class="n">trig2</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">.1</span> <span class="c1">; just to set the metronome!</span>
k<span class="n">speed</span> <span class="nb">init</span> <span class="mi">1</span>
<span class="c1">; ktime_unit, kstart, kloop, initndx, kfn_times </span>
k<span class="n">trig</span> <span class="nb">seqtime2</span> k<span class="n">trigin</span><span class="p">,</span> k<span class="n">speed</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">20</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> gi<span class="n">tabMap2</span>
<span class="c1">;ktrig seqtime kspeed, 0, 20, 0, gitabMap2 ; try with seqtime too... </span>
<span class="nb">schedkwhen</span> k<span class="n">trig</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</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="c1">; the duration is got from seqtime2 output!</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">2</span>
a<span class="n">1</span> <span class="nb">line</span> <span class="mi">1</span><span class="p">,</span><span class="nb">p3</span><span class="p">,</span><span class="mi">0</span>
a<span class="n">out</span> <span class="nb">oscili</span> <span class="mf">0.7</span><span class="o">*</span>a<span class="n">1</span><span class="p">,</span><span class="mi">500</span><span class="p">,</span>gi<span class="n">sine</span>
<span class="nb">outs1</span> a<span class="n">out</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">3</span>
a<span class="n">1</span> <span class="nb">line</span> <span class="mi">1</span><span class="p">,</span><span class="nb">p3</span><span class="p">,</span><span class="mi">0</span>
a<span class="n">out</span> <span class="nb">oscili</span> <span class="mf">0.7</span><span class="o">*</span>a<span class="n">1</span><span class="p">,</span><span class="mi">1000</span><span class="p">,</span>gi<span class="n">sine</span>
<span class="nb">outs2</span> a<span class="n">out</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">20</span>
<span class="c1">;f0 3600</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="idm281472891889240"></a>
<h2>See Also</h2>
<p>
<a class="link" href="GEN02.html" title="GEN02"><em class="citetitle">GEN02</em></a>,
<a class="link" href="GEN23.html" title="GEN23"><em class="citetitle">GEN23</em></a>,
<a class="link" href="seqtime.html" title="seqtime"><em class="citetitle">seqtime</em></a>,
<a class="link" href="trigseq.html" title="trigseq"><em class="citetitle">trigseq</em></a>,
<a class="link" href="trigseq.html" title="trigseq"><em class="citetitle">timedseq</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472891883368"></a>
<h2>Credits</h2>
<p>Author: Gabriel Maldonado</p>
</div>
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