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<div class="refentry" title="vincr">
<a id="vincr"></a>
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<a id="IndexVincr" class="indexterm"></a>
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<h2>
<span class="refentrytitle">vincr</span>
</h2>
<p>vincr —
Accumulates audio signals.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp52021320"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>vincr</em></span> increments one audio variable with another signal, i.e. it accumulates output.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp52008528"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>vincr</strong></span> accum, aincr</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp52009544"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>accum</em></span> -- audio-rate accumulator variable to be incremented
</p>
<p>
<span class="emphasis"><em>aincr</em></span> -- incrementing signal
</p>
<p>
<span class="emphasis"><em>vincr</em></span> (variable increment) and <a class="link" href="clear.html" title="clear"><em class="citetitle">clear</em></a> are intended to be used together. <span class="emphasis"><em>vincr</em></span> stores the result of the sum of two audio variables into the first variable itself (which is intended to be used as an accumulator in polyphony). The accumulator is typically a global variable that is used to combine signals from several sources (different instruments or instrument instances) for further processing (for example, via a global effect that reads the accumulator) or for outputting the combined signal by some means other than one of the <span class="emphasis"><em>out</em></span> opcodes (eg. via the <a class="link" href="fout.html" title="fout"><em class="citetitle">fout</em></a> opcode). After the accumulator is used, the accumulator variable should be set to zero by means of the <span class="emphasis"><em>clear</em></span> opcode (or it will explode).
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp52066936"></a>
<h2>Examples</h2>
<p>
The following example uses the vincr opcode. It uses the file <a class="ulink" href="examples/vincr.csd" target="_top"><em class="citetitle">vincr.csd</em></a>.
</p>
<div class="example">
<a id="idp52067912"></a>
<p class="title">
<strong>Example 952. Example of the vincr 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>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o vincr.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> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
gaReverb <span class="opc">init</span> 0
<span class="oblock">instr</span> 1
idur <span class="op">=</span> p3
kpitch <span class="op">=</span> p4
a1 <span class="opc">diskin2</span> "fox.wav", kpitch
a1 <span class="op">=</span> a1<span class="op">*</span>.5 <span class="comment">;reduce volume</span>
<span class="opc">vincr</span> gaReverb, a1
<span class="oblock">endin</span>
<span class="oblock">instr</span> 99 <span class="comment">; global reverb </span>
al, ar <span class="opc">reverbsc</span> gaReverb, gaReverb, .8, 10000
<span class="opc">outs</span> gaReverb<span class="op">+</span>al, gaReverb<span class="op">+</span>ar
<span class="opc">clear</span> gaReverb
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0 3 1
<span class="stamnt">i</span>99 0 5
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
This is another example uses the vincr opcode. It uses the file <a class="ulink" href="examples/vincr-complex.csd" target="_top"><em class="citetitle">vincr-complex.csd</em></a>.
</p>
<div class="example">
<a id="idp52070544"></a>
<p class="title">
<strong>Example 953. </strong>
</p>
<div class="example-contents">
<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>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o vincr-complex.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> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
gaReverbSend <span class="opc">init</span> 0
<span class="oblock">instr</span> 1
iamp <span class="op">=</span> p4
ifreq <span class="op">=</span> p5
aenv <span class="opc">linseg</span> 0.0, 0.1<span class="op">*</span>p3, iamp, 0.6<span class="op">*</span>p3, iamp, 0.3<span class="op">*</span>p3, 0.0
aosc <span class="opc">poscil</span> aenv, ifreq, 1
<span class="opc">vincr</span> gaReverbSend, aosc
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2 <span class="comment">; global reverb instrument</span>
al, ar <span class="opc">reverbsc</span> gaReverbSend, gaReverbSend, 0.85, 12000
<span class="opc">outs</span> gaReverbSend<span class="op">+</span>al, gaReverbSend<span class="op">+</span>ar
<span class="opc">clear</span> gaReverbSend
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span>1 0 4096 10 1
{ 4 CNT
{ 8 PARTIAL
<span class="comment">; start time duration amplitude frequency </span>
<span class="stamnt">i</span>1 [0.5 * $CNT.] [1 + ($CNT * 0.2)] [.04 + (~ * .02)] [800 + (200 * $CNT.) + ($PARTIAL. * 20)]
}
}
<span class="stamnt">i</span>2 0 6
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp52071328"></a>
<h2>See Also</h2>
<p>
<a class="link" href="clear.html" title="clear"><em class="citetitle">clear</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp52072344"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Gabriel Maldonado</td>
</tr>
<tr>
<td>Italy</td>
</tr>
<tr>
<td>1999</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.56</p>
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