<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>GEN32</title>
<link rel="stylesheet" href="csound.css" type="text/css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="ScoregensTop.html" title="Score Statements and GEN Routines" />
<link rel="prev" href="GEN31.html" title="GEN31" />
<link rel="next" href="GEN33.html" title="GEN33" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">GEN32</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="GEN31.html">Prev</a> </td>
<th width="60%" align="center">Score Statements and GEN Routines</th>
<td width="20%" align="right"> <a accesskey="n" href="GEN33.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry" title="GEN32">
<a id="GEN32"></a>
<div class="titlepage"></div>
<a id="IndexGEN32" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">GEN32</span>
</h2>
<p>GEN32 —
Mixes any waveform, resampled with either FFT or linear interpolation.
</p>
</div>
<div class="refsect1" title="Description">
<a id="id3743466"></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>
</div>
<div class="refsect1" title="Syntax">
<a id="id3743494"></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="id3743512"></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="id3743553"></a>
<h2>Examples</h2>
<p>
</p>
<div class="informalexample">
<pre class="programlisting">
itmp <span class="opc">ftgen</span> 1, 0, 16384, 7, 1, 16384, <span class="op">-</span>1 <span class="comment">; sawtooth</span>
itmp <span class="opc">ftgen</span> 2, 0, 8192, 10, 1 <span class="comment">; sine</span>
<span class="comment">; mix tables</span>
itmp <span class="opc">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">; window</span>
itmp <span class="opc">ftgen</span> 6, 0, 16384, 20, 3, 1
<span class="comment">; generate band-limited waveforms</span>
inote <span class="op">=</span> 0
<span class="olabel">loop0:</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="opc">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">out</span> a1 <span class="op">*</span> 10000
<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">out</span> a1 <span class="op">*</span> 2000
<span class="oblock">endin</span>
----------
score:
----------
<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></pre>
</div>
<p>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="id3744828"></a>
<h2>Credits</h2>
<p>Author: Rasmus Ekman</p>
<p>Programmer: Istvan Varga</p>
<p>New in version 4.17</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="GEN31.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="ScoregensTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="GEN33.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">GEN31 </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> GEN33</td>
</tr>
</table>
</div>
</body>
</html>
