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<h2>
<span class="refentrytitle">seqtime</span>
</h2>
<p>seqtime —
Generates a trigger signal according to the values stored in a table.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp42122904"></a>
<h2>Description</h2>
<p>
Generates a trigger signal according to the values stored in a table.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp42123584"></a>
<h2>Syntax</h2>
<pre class="synopsis">ktrig_out <span class="command"><strong>seqtime</strong></span> ktime_unit, kstart, kloop, kinitndx, kfn_times</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp42178952"></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>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" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Note: Note">
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<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Note]" src="images/note.png" />
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<th align="left">Note</th>
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<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>
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</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>seqtime</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 ktime_unit 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>
<div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;">
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</td>
<th align="left">Note</th>
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<td align="left" valign="top">
<p>Note that the <span class="emphasis"><em>kloop</em></span> index marks the loop boundary and is NOT included in the looped elements. If you want to loop the first four elements, you would set <span class="emphasis"><em>kstart</em></span> to 0 and <span class="emphasis"><em>kloop</em></span> to 4.</p>
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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 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>seqtime</em></span> opcode.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp42190952"></a>
<h2>Examples</h2>
<p>
Here is an example of the seqtime opcode. It uses the file <a class="ulink" href="examples/seqtime.csd" target="_top"><em class="citetitle">seqtime.csd</em></a>.
</p>
<div class="example">
<a id="idp42191928"></a>
<p class="title">
<strong>Example 758. Example of the seqtime 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>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out Audio in</span>
-odac -iadc <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o seqtime.wav -W ;;; for file output any platform</span>
<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> 64
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="comment">; By Tim Mortimer and Andres Cabrera 2007</span>
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
gisine <span class="ohdr">ftgen</span> 0, 0, 8192, 10, 1
<span class="comment">;;; table defining an integer pitch set</span>
gipset <span class="ohdr">ftgen</span> 0, 0, 4, <span class="op">-</span>2, 8.00, 8.04, 8.07, 8.10
<span class="comment">;;;DELTA times for seqtime</span>
gidelta <span class="ohdr">ftgen</span> 0, 0, 4, <span class="op">-</span>2, .5, 1, .25, 1.25
<span class="oblock">instr</span> 1
kndx <span class="opc">init</span> 0
ktrigger <span class="opc">init</span> 0
ktime_unit <span class="opc">init</span> 1
kstart <span class="opc">init</span> p4
kloop <span class="opc">init</span> p5
kinitndx <span class="opc">init</span> 0
kfn_times <span class="opc">init</span> gidelta
ktrigger <span class="opc">seqtime</span> ktime_unit, kstart, kloop, kinitndx, kfn_times
<span class="opc">printk2</span> ktrigger
<span class="octrl">if</span> (ktrigger <span class="op">></span> 0) then
kpitch <span class="opc">table</span> kndx, gipset
<span class="opc">event</span> "i", 2, 0, 1, kpitch
kndx <span class="op">=</span> kndx <span class="op">+</span> 1
kndx <span class="op">=</span> kndx <span class="op">%</span> kloop
<span class="octrl">endif</span>
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2
icps <span class="op">=</span> <span class="opc">cpspch</span> (p4)
a1 <span class="opc">buzz</span> 1, icps, 7, gisine
aamp <span class="opc">expseg</span> 0.00003,.02,1,p3<span class="op">-</span>.02,0.00003
a1 <span class="op">=</span> a1 <span class="op">*</span> aamp <span class="op">*</span> 0.5
<span class="opc">out</span> a1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; start dur kstart kloop</span>
<span class="stamnt">i</span> 1 0 7 0 4
<span class="stamnt">i</span> 1 8 10 0 3
<span class="stamnt">i</span> 1 19 10 4 4
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp42194208"></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="trigseq.html" title="trigseq"><em class="citetitle">trigseq</em></a>
<a class="link" href="seqtime2.html" title="seqtime2"><em class="citetitle">seqtime2</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp42196648"></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>New in version 4.06</p>
<p>Example by: Tim Mortimer and Andres Cabrera 2007</p>
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