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<h2>
<span class="refentrytitle">maca</span>
</h2>
<p>maca —
Multiply and accumulate a-rate signals only.
</p>
</div>
<div class="refsect1">
<a id="idm281472916783384"></a>
<h2>Description</h2>
<p>
Multiply and accumulate a-rate signals only.
</p>
</div>
<div class="refsect1">
<a id="idm281472916712600"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>maca</strong></span> asig1 , asig2 [, asig3] [, asig4] [, asig5] [...]</pre>
</div>
<div class="refsect1">
<a id="idm281472916710424"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>asig1, asig2, ...</em></span> -- a-rate input signals
</p>
<p>
<span class="emphasis"><em>maca</em></span> multiplies and accumulates a-rate signals only. It is equivalent to:
</p>
<div class="literallayout">
<p><br />
ares = asig1*asig2 + asig3*asig4 + asig5*asig6 + ...<br />
</p>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a id="idm281472916707016"></a>
<h2>Examples</h2>
<p>
Here is an example of the maca opcode. It uses the file <a class="ulink" href="examples/maca.csd" target="_top"><em class="citetitle">maca.csd</em></a>. It is written for *NIX systems, and will generate errors on Windows.
</p>
<div class="example">
<a id="idm281472916705096"></a>
<p class="title">
<strong>Example 512. Example of the maca 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="idm281472741950296"></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 real audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o mac.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>
<span class="kd">instr</span> <span class="nf">1</span> <span class="c1">;4 band equalizer</span>
k<span class="n">low</span> <span class="o">=</span> <span class="nb">p4</span> <span class="c1">;low gain1</span>
a<span class="n">env1</span> <span class="nb">oscil</span> <span class="mf">0.2</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">4</span>
a<span class="n">env1</span> <span class="o">=</span> a<span class="n">env1</span> <span class="o">+</span> k<span class="n">low</span>
k<span class="n">lmid</span> <span class="o">=</span> <span class="nb">p5</span> <span class="c1">;low gain2 </span>
a<span class="n">env2</span> <span class="nb">oscil</span> <span class="mf">0.21</span><span class="p">,</span> <span class="mf">1.1</span><span class="p">,</span> <span class="mi">4</span>
a<span class="n">env2</span> <span class="o">=</span> a<span class="n">env2</span> <span class="o">+</span> k<span class="n">lmid</span>
k<span class="n">midh</span> <span class="o">=</span> <span class="nb">p6</span> <span class="c1">;high gain1</span>
a<span class="n">env3</span> <span class="nb">oscil</span> <span class="mf">0.19</span><span class="p">,</span> <span class="mf">1.2</span><span class="p">,</span> <span class="mi">4</span>
a<span class="n">env3</span> <span class="o">=</span> a<span class="n">env3</span> <span class="o">+</span> k<span class="n">midh</span>
k<span class="n">high</span> <span class="o">=</span> <span class="nb">p7</span> <span class="c1">;high gain2</span>
a<span class="n">env4</span> <span class="nb">oscil</span> <span class="mf">0.18</span><span class="p">,</span> <span class="mf">1.3</span><span class="p">,</span> <span class="mi">4</span>
a<span class="n">env4</span> <span class="o">=</span> a<span class="n">env4</span> <span class="o">+</span> k<span class="n">high</span>
i<span class="n">fn</span> <span class="o">=</span> <span class="nb">p8</span> <span class="c1">;table</span>
i<span class="n">lc1</span> <span class="nb">table</span> <span class="mi">0</span><span class="p">,</span> i<span class="n">fn</span> <span class="c1">;low freqency range</span>
i<span class="n">lc2</span> <span class="nb">table</span> <span class="mi">1</span><span class="p">,</span> i<span class="n">fn</span> <span class="c1">;low-mid</span>
i<span class="n">hc1</span> <span class="nb">table</span> <span class="mi">2</span><span class="p">,</span> i<span class="n">fn</span> <span class="c1">;mid-high</span>
i<span class="n">hc2</span> <span class="nb">table</span> <span class="mi">3</span><span class="p">,</span> i<span class="n">fn</span> <span class="c1">;high</span>
a<span class="n">sig</span> <span class="nb">diskin2</span> <span class="s">"fox.wav"</span><span class="p">,</span> <span class="mi">1</span>
a<span class="n">low1</span> <span class="nb">butterlp</span> a<span class="n">sig</span><span class="p">,</span> i<span class="n">lc1</span> <span class="c1">;lowpass 1</span>
a<span class="n">lmid</span> <span class="nb">butterlp</span> a<span class="n">sig</span><span class="p">,</span> i<span class="n">lc2</span> <span class="c1">;lowpass 2</span>
a<span class="n">midh</span> <span class="nb">butterhp</span> a<span class="n">sig</span><span class="p">,</span> i<span class="n">hc1</span> <span class="c1">;highpass 1</span>
a<span class="n">high</span> <span class="nb">butterhp</span> a<span class="n">sig</span><span class="p">,</span> i<span class="n">hc2</span> <span class="c1">;highpass 2</span>
a<span class="n">out</span> <span class="nb">maca</span> a<span class="n">env1</span><span class="p">,</span> a<span class="n">low1</span><span class="p">,</span> a<span class="n">env2</span><span class="p">,</span> a<span class="n">lmid</span><span class="p">,</span> a<span class="n">env3</span><span class="p">,</span> a<span class="n">midh</span><span class="p">,</span> a<span class="n">env4</span><span class="p">,</span> a<span class="n">high</span>
<span class="nb">outs</span> a<span class="n">out</span><span class="p">,</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">f</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">4</span> <span class="o">-</span><span class="mi">2</span> <span class="mi">150</span> <span class="mi">300</span> <span class="mi">600</span> <span class="mi">5000</span>
<span class="nb">f</span><span class="mi">2</span> <span class="mi">0</span> <span class="mi">4</span> <span class="o">-</span><span class="mi">2</span> <span class="mi">75</span> <span class="mi">500</span> <span class="mi">1000</span> <span class="mi">10000</span>
<span class="nb">f</span><span class="mi">3</span> <span class="mi">0</span> <span class="mi">4</span> <span class="o">-</span><span class="mi">2</span> <span class="mi">200</span> <span class="mi">700</span> <span class="mi">1500</span> <span class="mi">3000</span>
<span class="nb">f</span><span class="mi">4</span> <span class="mi">0</span> <span class="mi">4096</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="c1">; low lowmid midhigh high table </span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mf">2.8</span> <span class="mi">2</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">1</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">3</span> <span class="mf">2.8</span> <span class="mi">2</span> <span class="mi">3</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">2</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">6</span> <span class="mf">2.8</span> <span class="mi">2</span> <span class="mi">1</span> <span class="mi">2</span> <span class="mi">3</span> <span class="mi">3</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="idm281472916700808"></a>
<h2>See Also</h2>
<p>
<a class="link" href="mac.html" title="mac"><em class="citetitle">mac</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472916698792"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: John ffitch</td>
</tr>
<tr>
<td>University of Bath, Codemist, Ltd.</td>
</tr>
<tr>
<td>Bath, UK</td>
</tr>
<tr>
<td>May 1999</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.54</p>
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