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<a id="vincr"></a>
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<h2>
<span class="refentrytitle">vincr</span>
</h2>
<p>vincr —
Accumulates audio signals.
</p>
</div>
<div class="refsect1">
<a id="idm281472872537608"></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">
<a id="idm281472872462328"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>vincr</strong></span> accum, aincr</pre>
</div>
<div class="refsect1">
<a id="idm281472872460280"></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">
<a id="idm281472872453192"></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="idm281472872451336"></a>
<p class="title">
<strong>Example 1084. 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>
<div class="refsect1">
<a id="idm281472692851304"></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 vincr.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>
ga<span class="n">Reverb</span> <span class="nb">init</span> <span class="mi">0</span>
<span class="kd">instr</span> <span class="nf">1</span>
i<span class="n">dur</span> <span class="o">=</span> <span class="nb">p3</span>
k<span class="n">pitch</span> <span class="o">=</span> <span class="nb">p4</span>
a<span class="n">1</span> <span class="nb">diskin2</span> <span class="s">"fox.wav"</span><span class="p">,</span> k<span class="n">pitch</span>
a<span class="n">1</span> <span class="o">=</span> a<span class="n">1</span><span class="o">*</span><span class="mf">.5</span> <span class="c1">;reduce volume</span>
<span class="nb">vincr</span> ga<span class="n">Reverb</span><span class="p">,</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">99</span> <span class="c1">; global reverb </span>
a<span class="n">l</span><span class="p">,</span> a<span class="n">r</span> <span class="nb">reverbsc</span> ga<span class="n">Reverb</span><span class="p">,</span> ga<span class="n">Reverb</span><span class="p">,</span> <span class="mf">.8</span><span class="p">,</span> <span class="mi">10000</span>
<span class="nb">outs</span> ga<span class="n">Reverb</span><span class="o">+</span>a<span class="n">l</span><span class="p">,</span> ga<span class="n">Reverb</span><span class="o">+</span>a<span class="n">r</span>
<span class="nb">clear</span> ga<span class="n">Reverb</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">3</span> <span class="mi">1</span>
<span class="nb">i</span><span class="mi">99</span> <span class="mi">0</span> <span class="mi">5</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" />
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="idm281472872446424"></a>
<p class="title">
<strong>Example 1085. </strong>
</p>
<div class="example-contents">
<div class="refsect1">
<a id="idm281472692743672"></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 vincr-complex.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>
ga<span class="n">ReverbSend</span> <span class="nb">init</span> <span class="mi">0</span>
<span class="kd">instr</span> <span class="nf">1</span>
i<span class="n">amp</span> <span class="o">=</span> <span class="nb">p4</span>
i<span class="n">freq</span> <span class="o">=</span> <span class="nb">p5</span>
a<span class="n">env</span> <span class="nb">linseg</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">0.1</span><span class="o">*</span><span class="nb">p3</span><span class="p">,</span> i<span class="n">amp</span><span class="p">,</span> <span class="mf">0.6</span><span class="o">*</span><span class="nb">p3</span><span class="p">,</span> i<span class="n">amp</span><span class="p">,</span> <span class="mf">0.3</span><span class="o">*</span><span class="nb">p3</span><span class="p">,</span> <span class="mf">0.0</span>
a<span class="n">osc</span> <span class="nb">poscil</span> a<span class="n">env</span><span class="p">,</span> i<span class="n">freq</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">vincr</span> ga<span class="n">ReverbSend</span><span class="p">,</span> a<span class="n">osc</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">2</span> <span class="c1">; global reverb instrument</span>
a<span class="n">l</span><span class="p">,</span> a<span class="n">r</span> <span class="nb">reverbsc</span> ga<span class="n">ReverbSend</span><span class="p">,</span> ga<span class="n">ReverbSend</span><span class="p">,</span> <span class="mf">0.85</span><span class="p">,</span> <span class="mi">12000</span>
<span class="nb">outs</span> ga<span class="n">ReverbSend</span><span class="o">+</span>a<span class="n">l</span><span class="p">,</span> ga<span class="n">ReverbSend</span><span class="o">+</span>a<span class="n">r</span>
<span class="nb">clear</span> ga<span class="n">ReverbSend</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">4096</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="p">{</span> <span class="mi">4</span> <span class="cp">CNT</span>
<span class="p">{</span> <span class="mi">8</span> <span class="cp">PARTIAL</span>
<span class="c1">; start time duration amplitude frequency </span>
<span class="nb">i</span><span class="mi">1</span> <span class="p">[</span><span class="mf">0.5</span> <span class="o">*</span> <span class="cp">$CNT.</span><span class="p">]</span> <span class="p">[</span><span class="mi">1</span> <span class="o">+</span> <span class="p">(</span><span class="cp">$CNT</span> <span class="o">*</span> <span class="mf">0.2</span><span class="p">)]</span> <span class="p">[</span><span class="mf">.04</span> <span class="o">+</span> <span class="p">(</span><span class="o">~</span> <span class="o">*</span> <span class="mf">.02</span><span class="p">)]</span> <span class="p">[</span><span class="mi">800</span> <span class="o">+</span> <span class="p">(</span><span class="mi">200</span> <span class="o">*</span> <span class="cp">$CNT.</span><span class="p">)</span> <span class="o">+</span> <span class="p">(</span><span class="cp">$PARTIAL.</span> <span class="o">*</span> <span class="mi">20</span><span class="p">)]</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="nb">i</span><span class="mi">2</span> <span class="mi">0</span> <span class="mi">6</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="idm281472872444936"></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">
<a id="idm281472872442888"></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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