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<div class="refentry" title="MixerClear">
<a id="MixerClear"></a>
<div class="titlepage"></div>
<a id="IndexMixerClear" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">MixerClear</span>
</h2>
<p>MixerClear —
Resets all channels of a buss to 0.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp31954968"></a>
<h2>Syntax</h2>
<pre class="synopsis">
<span class="command">
<strong>MixerClear</strong>
</span>
</pre>
</div>
<div class="refsect1" title="Description">
<a id="idp31955920"></a>
<h2>Description</h2>
<p>Resets all channels of a buss to 0.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp31958784"></a>
<h2>Performance</h2>
<p>
Use of the mixer requires that instruments setting gains have smaller numbers than instruments sending signals,
and that instruments sending signals have smaller numbers than instruments receiving those signals.
However, an instrument may have any number of sends or receives. After the final signal is received,
<a class="link" href="MixerClear.html" title="MixerClear"><em class="citetitle">MixerClear</em></a> must be invoked to reset the busses to 0 before the next kperiod.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp31960240"></a>
<h2>Examples</h2>
<pre class="programlisting">
<span class="oblock">instr</span> 220 <span class="comment">; Master output</span>
<span class="comment">; It applies a bass enhancement, compression and fadeout</span>
<span class="comment">; to the whole piece, outputs signals, and clears the mixer.</span>
a1 <span class="opc">MixerReceive</span> 220, 0
a2 <span class="opc">MixerReceive</span> 220, 1
<span class="comment">; Bass enhancement</span>
al1 <span class="opc">butterlp</span> a1, 100
al2 <span class="opc">butterlp</span> a2, 100
a1 <span class="op">=</span> al1<span class="op">*</span>1.5 <span class="op">+</span> a1
a2 <span class="op">=</span> al2<span class="op">*</span>1.5 <span class="op">+</span> a2
<span class="comment">; Global amplitude shape</span>
kenv <span class="opc">linseg</span> 0., p5 <span class="op">/</span> 2.0, p4, p3 <span class="op">-</span> p5, p4, p5 <span class="op">/</span> 2.0, 0.
a1<span class="op">=</span>a1<span class="op">*</span>kenv
a2<span class="op">=</span>a2<span class="op">*</span>kenv
<span class="comment">; Compression</span>
a1 <span class="opc">dam</span> a1, 5000, 0.5, 1, 0.2, 0.1
a2 <span class="opc">dam</span> a2, 5000, 0.5, 1, 0.2, 0.1
<span class="comment">; Remove DC bias</span>
a1blocked <span class="opc">dcblock</span> a1
a2blocked <span class="opc">dcblock</span> a2
<span class="comment">; Output signals</span>
<span class="opc">outs</span> a1blocked, a2blocked
<span class="opc">MixerClear</span>
<span class="oblock">endin</span></pre>
<p>
Here is a complete example of the Mixerclear opcode. It uses the file <a class="ulink" href="examples/Mixer.csd" target="_top"><em class="citetitle">Mixer.csd</em></a>
</p>
<div class="example">
<a id="idp32023248"></a>
<p class="title">
<strong>Example 486. Complete example of the Mixerclear opcode.</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>
<span class="comment">; Audio out Audio in</span>
-odac <span class="comment">; -iadc ;;;RT audio out</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o Mixer.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
<span class="oblock">instr</span> 1
katt <span class="opc">expon</span> 0.01, p3, 1 <span class="comment">;create an attack</span>
aout <span class="opc">poscil</span> .7, 440,1
<span class="opc">MixerSetLevel</span> 1, 3, katt <span class="comment">;impose attack on the gain level</span>
<span class="opc">MixerSend</span> aout, 1, 3, 0 <span class="comment">;send to channel 0</span>
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2
aout <span class="opc">vco2</span> .5, 110 <span class="comment">;saw wave</span>
<span class="opc">MixerSetLevel</span> 2, 3, .25 <span class="comment">;set level to .25 of vco2</span>
<span class="opc">MixerSend</span> aout, 2, 3, 1 <span class="comment">;send to channel 1</span>
<span class="oblock">endin</span>
<span class="oblock">instr</span> 3 <span class="comment">;mix instr.1 and 2 with reverb</span>
kgain1 <span class="opc">MixerGetLevel</span> 1,3 <span class="comment">;get level form buss 3</span>
kgain2 <span class="opc">MixerGetLevel</span> 2,3 <span class="comment">;get level form buss 3</span>
a1 <span class="opc">MixerReceive</span> 3,0 <span class="comment">;receive channel 0</span>
a2 <span class="opc">MixerReceive</span> 3,1 <span class="comment">;receive channel 1</span>
aout <span class="op">=</span> a1<span class="op">*</span>kgain1<span class="op">+</span>a2<span class="op">*</span>kgain2 <span class="comment">;mix them</span>
aoutL, aoutR <span class="opc">reverbsc</span> aout, aout, 0.85, 12000 <span class="comment">;add a nicereverb</span>
<span class="opc">outs</span> aoutL, aoutR
<span class="opc">MixerClear</span>
<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
<span class="stamnt">i</span>1 0 2
<span class="stamnt">i</span>2 0 2
<span class="stamnt">i</span>3 0 8 <span class="comment">;reverb stays on for 8 sec.</span>
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp32024264"></a>
<h2>Credits</h2>
<p>Author: Michael Gogins (gogins at pipeline dot com).</p>
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