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<h2>
<span class="refentrytitle">STKHevyMetl</span>
</h2>
<p>STKHevyMetl —
STKHevyMetl produces metal sounds.
</p>
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<div class="refsect1">
<a id="idm281472884912824"></a>
<h2>Description</h2>
<p>
STKHevyMetl produces metal sounds, using FM synthesis.
It uses 3 cascade operators with feedback modulation, also referred to as algorithm 3 of the TX81Z.
</p>
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<div class="refsect1">
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<h2>Syntax</h2>
<pre class="synopsis">asignal <span class="command"><strong>STKHevyMetl</strong></span> ifrequency, iamplitude, [kmod, kv1[, kcross, kv2[, klfo, kv3[, klfodepth, kv4[, kadsr, kv5]]]]]</pre>
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<div class="refsect1">
<a id="idm281472884919272"></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>
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<div class="refsect1">
<a id="idm281472884850520"></a>
<h2>Performance</h2>
<p><span class="emphasis"><em>kmod</em></span> -- controller2, total modulator index. Value range of kv1 is 0-127.</p>
<p><span class="emphasis"><em>kcross</em></span> -- controller 4, crossfade of modulator. Value range of kv2 is 0-127.</p>
<p><span class="emphasis"><em>klfo</em></span> -- controller 11, speed of low-frequency oscillator. Value range of kv3 is 0-127.</p>
<p><span class="emphasis"><em>klfodepth</em></span> -- controller 1, depth of low-frequency oscillator. Value range of kv4 is 0-127.</p>
<p><span class="emphasis"><em>kadsr</em></span> -- controller 128, ADSR 2 and 4 target. Value range of kv5 is 0-127.</p>
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<div class="refsect1">
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<img alt="[Note]" src="images/note.png" />
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<th align="left">Note</th>
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<p>
The code for this opcode is taken directly from the HevyMetl 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>
<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). Both the controller numbers and the controller values are krate variables. However, during a performance, normally the controller numbers stay fixed while the corresponding controller values may change at any time.
The order of the controller pair is arbitrary, as long as they are after <span class="emphasis"><em>iamplitude</em></span>. Also, it is not needed that all controller pairs are used.
</p>
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<div class="refsect1">
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<h2>Examples</h2>
<p>
Here is an example of the STKHevyMetl opcode. It uses the file <a class="ulink" href="examples/STKHevyMetl.csd" target="_top"><em class="citetitle">STKHevyMetl.csd</em></a>.
</p>
<div class="example">
<a id="idm281472884839752"></a>
<p class="title">
<strong>Example 932. Example of the STKHevyMetl opcode.</strong>
</p>
<div class="example-contents">
<div class="refsect1">
<a id="idm281472706419352"></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 STKHevyMetl.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>
i<span class="n">frq</span> <span class="o">=</span> <span class="nb">p4</span>
k<span class="n">v1</span> <span class="nb">line</span> <span class="nb">p5</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="nb">p6</span> <span class="c1">;Total Modulator Index</span>
k<span class="n">v2</span> <span class="nb">line</span> <span class="nb">p7</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">;Modulator Crossfade</span>
a<span class="n">sig</span> <span class="nb">STKHevyMetl</span> <span class="nb">cpspch</span><span class="p">(</span>i<span class="n">frq</span><span class="p">),</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> k<span class="n">v1</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> k<span class="n">v2</span><span class="p">,</span> <span class="mi">11</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">100</span><span class="p">,</span> <span class="mi">128</span><span class="p">,</span> <span class="mi">40</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</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">7</span> <span class="mf">8.05</span> <span class="mi">100</span> <span class="mi">0</span> <span class="mi">100</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">3</span> <span class="mi">7</span> <span class="mf">9.03</span> <span class="mi">20</span> <span class="mi">120</span> <span class="mi">0</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">3</span> <span class="mf">.5</span> <span class="mf">8.05</span> <span class="mi">20</span> <span class="mi">120</span> <span class="mi">0</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">4</span> <span class="mf">.5</span> <span class="mf">9.09</span> <span class="mi">20</span> <span class="mi">120</span> <span class="mi">0</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">5</span> <span class="mi">3</span> <span class="mf">9.00</span> <span class="mi">20</span> <span class="mi">120</span> <span class="mi">0</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1">
<a id="idm281472884837832"></a>
<h2>See Also</h2>
<p>
<a class="link" href="STKWurley.html" title="STKWurley"><em class="citetitle">STKWurley</em></a>.
</p>
</div>
<div class="refsect1">
<a id="idm281472884835752"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Michael Gogins (after Perry Cook)</td>
</tr>
<tr>
<td>Irreducible Productions</td>
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<tr>
<td>New York, NY</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 5.11</p>
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