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<div class="refentry" title="STKBowed">
<a id="STKBowed"></a>
<div class="titlepage"></div>
<a id="IndexStkbowed" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">STKBowed</span>
</h2>
<p>STKBowed —
STKBowed is a bowed string instrument.
</p>
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<div class="refsect1" title="Description">
<a id="idp45510160"></a>
<h2>Description</h2>
<p>
STKBowed is a bowed string instrument, using a waveguide model.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp45510832"></a>
<h2>Syntax</h2>
<pre class="synopsis">asignal <span class="command"><strong>STKBowed</strong></span> ifrequency, iamplitude, [kc1, kv1[, kc2, kv2[, kc3, kv3[, kc4, kv4[, kc5, kv5]]]]]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp45521344"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifrequency</em></span> -- Frequency of note played, in Hertz.
</p>
<p>
<span class="emphasis"><em>iamplitude</em></span> -- Amplitude of note played (range 0-1).
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp45522640"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kc1, kv1, kc2, kv2, kc3, kv3, kc4, kv4, kc5, kv5, kc6, kv6, kc7, kv7, kc8, kv8</em></span> -- Up to 8 optional k-rate controller pairs for the STK opcodes.
Each controller pair consists of a controller number (kc) followed by a controller value (kv). The 5 controller numbers and values that work for STKBowed are:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" type="disc">
<li class="listitem">
<p><span class="emphasis"><em>kc, kv</em></span> -- 2, bow pressure.</p>
</li>
<li class="listitem">
<p><span class="emphasis"><em>kc, kv</em></span> -- 4, position on bow.</p>
</li>
<li class="listitem">
<p><span class="emphasis"><em>kc, kv</em></span> -- 11, speed of low-frequency oscillator.</p>
</li>
<li class="listitem">
<p><span class="emphasis"><em>kc, kv</em></span> -- 1, depth of low-frequency oscillator.</p>
</li>
<li class="listitem">
<p><span class="emphasis"><em>kc, kv</em></span> -- 128, volume.</p>
</li>
</ul>
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<p>
</p>
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<div class="refsect1">
<a id="idp45555856"></a>
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<th align="left">Note</th>
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<td align="left" valign="top">
<p>
The code for this opcode is taken directly from the Bowed class in the Synthesis Toolkit in C++ by Perry R. Cook and Gary P. Scavone. More on the STK classes can be found here:
<a class="ulink" href="https://ccrma.stanford.edu/software/stk/classes.html" target="_top"><em class="citetitle">https://ccrma.stanford.edu/software/stk/classes.html</em></a>
</p>
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<div class="refsect1" title="Examples">
<a id="idp45557328"></a>
<h2>Examples</h2>
<p>
Here is an example of the STKBowed opcode. It uses the file <a class="ulink" href="examples/STKBowed.csd" target="_top"><em class="citetitle">STKBowed.csd</em></a>.
</p>
<div class="example">
<a id="idp45558304"></a>
<p class="title">
<strong>Example 802. Example of the STKBowed 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>
-odac <span class="comment">;;;RT 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 STKBowed.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
ipch <span class="op">=</span> p4
kpos <span class="op">=</span> p7
kpres <span class="opc">line</span> p5, p3, p6
kvib <span class="opc">line</span> 0, p3, 7
asig <span class="opc">STKBowed</span> <span class="opc">cpspch</span>(ipch), 1, 2, kpres, 4, kpos, 11, 40, 1, kvib, 128, 100
asig <span class="op">=</span> asig<span class="op">*</span>4 <span class="comment">;amplify</span>
<span class="opc">outs</span> asig, asig
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 5 6.00 20 100 127
<span class="stamnt">i</span> 1 + 3 7.00 120 0 0
<span class="stamnt">i</span> 1 8 3 7.05 120 0 30
<span class="stamnt">i</span> 1 8 4 7.03 50 0 0
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1" title="Credits">
<a id="idp45559304"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Michael Gogins (after Perry Cook)</td>
</tr>
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<td>Irreducible Productions</td>
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<td>New York, NY</td>
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<p>
</p>
<p>New in Csound version 5.11</p>
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