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<div class="refentry" title="phasorbnk">
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<h2>
<span class="refentrytitle">phasorbnk</span>
</h2>
<p>phasorbnk —
Produce an arbitrary number of normalized moving phase values.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp36213704"></a>
<h2>Description</h2>
<p>
Produce an arbitrary number of normalized moving phase values, accessable by an index.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp36214400"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>phasorbnk</strong></span> xcps, kndx, icnt [, iphs]</pre>
<pre class="synopsis">kres <span class="command"><strong>phasorbnk</strong></span> kcps, kndx, icnt [, iphs]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp36225584"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>icnt</em></span> -- maximum number of phasors to be used.
</p>
<p>
<span class="emphasis"><em>iphs</em></span> -- initial phase, expressed as a fraction of a cycle (0 to 1). If -1 initialization is skipped. If <span class="emphasis"><em>iphas</em></span>>1 each phasor will be initialized with a random value.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp36227296"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kndx</em></span> -- index value to access individual phasors
</p>
<p>
For each independent phasor, an internal phase is successively accumulated in accordance with the <span class="emphasis"><em>kcps</em></span> or <span class="emphasis"><em>xcps</em></span> frequency to produce a moving phase value, normalized to lie in the range 0 <= phs < 1. Each individual phasor is accessed by index <span class="emphasis"><em>kndx</em></span>.
</p>
<p>
This phasor bank can be used inside a k-rate loop to generate multiple independent voices, or together with the <a class="link" href="adsynt.html" title="adsynt"><em class="citetitle">adsynt</em></a> opcode to change parameters in the tables used by <span class="emphasis"><em>adsynt</em></span>.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp36276448"></a>
<h2>Examples</h2>
<p>
Here is an example of the phasorbnk opcode. It uses the file <a class="ulink" href="examples/phasorbnk.csd" target="_top"><em class="citetitle">phasorbnk.csd</em></a>.
</p>
<div class="example">
<a id="idp36277392"></a>
<p class="title">
<strong>Example 589. Example of the phasorbnk 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 No messages</span>
-odac -iadc -d <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 phasorbnk.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Initialize the global variables.</span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="comment">; Generate a sinewave table.</span>
giwave <span class="ohdr">ftgen</span> 1, 0, 1024, 10, 1
<span class="comment">; Instrument #1</span>
<span class="oblock">instr</span> 1
<span class="comment">; Generate 10 voices.</span>
icnt <span class="op">=</span> 10
<span class="comment">; Empty the output buffer.</span>
asum <span class="op">=</span> 0
<span class="comment">; Reset the loop index.</span>
kindex <span class="op">=</span> 0
<span class="comment">; This loop is executed every k-cycle.</span>
<span class="olabel">loop</span><span class="op">:</span>
<span class="comment">; Generate non-harmonic partials.</span>
kcps <span class="op">=</span> (kindex<span class="op">+</span>1)<span class="op">*</span>100<span class="op">+</span>30
<span class="comment">; Get the phase for each voice.</span>
aphas <span class="opc">phasorbnk</span> kcps, kindex, icnt
<span class="comment">; Read the wave from the table.</span>
asig <span class="opc">table</span> aphas, giwave, 1
<span class="comment">; Accumulate the audio output.</span>
asum <span class="op">=</span> asum <span class="op">+</span> asig
<span class="comment">; Increment the index.</span>
kindex <span class="op">=</span> kindex <span class="op">+</span> 1
<span class="comment">; Perform the loop until the index (kindex) reaches </span>
<span class="comment">; the counter value (icnt).</span>
<span class="octrl">if</span> (kindex <span class="op"><</span> icnt) <span class="octrl">kgoto</span> <span class="olabel">loop</span>
<span class="opc">out</span> asum<span class="op">*</span>3000
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Play Instrument #1 for two seconds.</span>
<span class="stamnt">i</span> 1 0 2
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
Generate multiple voices with independent partials. This example is better with <span class="emphasis"><em>adsynt</em></span>. See also the example under <a class="link" href="adsynt.html" title="adsynt"><em class="citetitle">adsynt</em></a>, for k-rate use of <span class="emphasis"><em>phasorbnk</em></span>.
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp36280696"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Peter Neubäcker</td>
</tr>
<tr>
<td>Munich, Germany</td>
</tr>
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<td>August 1999</td>
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<p>
</p>
<p>New in Csound version 3.58</p>
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