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<div class="refentry" title="GEN32">
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<h2>
<span class="refentrytitle">GEN32</span>
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<p>GEN32 —
Mixes any waveform, resampled with either FFT or linear interpolation.
</p>
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<div class="refsect1" title="Description">
<a id="idp78204960"></a>
<h2>Description</h2>
<p>
This routine is similar to <a class="link" href="GEN31.html" title="GEN31"><em class="citetitle">GEN31</em></a>, but allows specifying source ftable for each partial. Tables can be resampled either with FFT, or linear interpolation.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp78199496"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>f</strong></span> # time size 32 srca pna stra phsa srcb pnb strb phsb ...</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp78200568"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>srca, srcb</em></span> -- source table number. A negative value can be used to read the table with linear interpolation (by default, the source waveform is transposed and phase shifted using FFT); this is less accurate, but faster, and allows non-integer and negative partial numbers.
</p>
<p>
<span class="emphasis"><em>pna, pnb, ...</em></span> -- partial number, must be a positive integer if source table number is positive (i.e. resample with FFT).
</p>
<p>
<span class="emphasis"><em>stra, strb, ...</em></span> -- amplitude scale
</p>
<p>
<span class="emphasis"><em>phsa, phsb, ...</em></span> -- start phase (0 to 1)
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp78252776"></a>
<h2>Examples</h2>
<p>
Here is an example of the GEN32 routine. It uses the file <a class="ulink" href="examples/gen32.csd" target="_top"><em class="citetitle">gen32.csd</em></a>.
</p>
<div class="example">
<a id="idp78253744"></a>
<p class="title">
<strong>Example 1064. Example of the gen32 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>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o gen32.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
itmp <span class="ohdr">ftgen</span> 1, 0, 16384, 7, 1, 16384, <span class="op">-</span>1 <span class="comment">; sawtooth</span>
itmp <span class="ohdr">ftgen</span> 2, 0, 8192, 10, 1 <span class="comment">; sine</span>
itmp <span class="ohdr">ftgen</span> 5, 0, 4096, <span class="op">-</span>32, <span class="op">-</span>2, 1.5, 1.0, 0.25, 1, 2, 0.5, 0, 1, 3, <span class="op">-</span>0.25, 0.5 <span class="comment">; mix tables</span>
itmp <span class="ohdr">ftgen</span> 6, 0, 16384, 20, 3, 1 <span class="comment">; window</span>
<span class="comment">; generate band-limited waveforms</span>
inote <span class="op">=</span> 0
<span class="olabel">loop0</span><span class="op">:</span>
icps <span class="op">=</span> 440 <span class="op">*</span> <span class="opc">exp</span>(<span class="opc">log</span>(2) <span class="op">*</span> (inote <span class="op">-</span> 69) <span class="op">/</span> 12) <span class="comment">; one table for</span>
inumh <span class="op">=</span> <span class="ohdr">sr</span> <span class="op">/</span> (2 <span class="op">*</span> icps) <span class="comment">; each MIDI note number</span>
ift <span class="op">=</span> <span class="opc">int</span>(inote <span class="op">+</span> 256.5)
itmp <span class="ohdr">ftgen</span> ift, 0, 4096, <span class="op">-</span>30, 5, 1, inumh
inote <span class="op">=</span> inote <span class="op">+</span> 1
<span class="octrl">if</span> (inote <span class="op"><</span> 127.5) <span class="octrl">igoto</span> <span class="olabel">loop0</span>
<span class="oblock">instr</span> 1
kcps <span class="opc">expon</span> 20, p3, 16000
kft <span class="op">=</span> <span class="opc">int</span>(256.5 <span class="op">+</span> 69 <span class="op">+</span> 12 <span class="op">*</span> <span class="opc">log</span>(kcps <span class="op">/</span> 440) <span class="op">/</span> <span class="opc">log</span>(2))
kft <span class="op">=</span> (kft <span class="op">></span> 383 <span class="op">?</span> 383 <span class="op">:</span> kft)
a1 <span class="opc">phasor</span> kcps
a1 <span class="opc">tableikt</span> a1, kft, 1, 0, 1
<span class="opc">outs</span> a1<span class="op">*</span>.5, a1<span class="op">*</span>.5
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2
kcps <span class="opc">expon</span> 20, p3, 16000
kft <span class="op">=</span> <span class="opc">int</span>(256.5 <span class="op">+</span> 69 <span class="op">+</span> 12 <span class="op">*</span> <span class="opc">log</span>(kcps <span class="op">/</span> 440) <span class="op">/</span> <span class="opc">log</span>(2))
kft <span class="op">=</span> (kft <span class="op">></span> 383 <span class="op">?</span> 383 <span class="op">:</span> kft)
kgdur <span class="opc">limit</span> 10 <span class="op">/</span> kcps, 0.1, 1
a1 <span class="opc">grain2</span> kcps, 0.02, kgdur, 30, kft, 6, <span class="op">-</span>0.5
<span class="opc">outs</span> a1<span class="op">*</span>.08, a1<span class="op">*</span>.08
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">t</span> 0 60
<span class="stamnt">i</span> 1 0 10
<span class="stamnt">i</span> 2 12 10
<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="idp78256016"></a>
<h2>Credits</h2>
<p>Author: Rasmus Ekman</p>
<p>Programmer: Istvan Varga</p>
<p>New in version 4.17</p>
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