<?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>poscil3</title> <link rel="stylesheet" type="text/css" href="csound.css" /> <link rel="stylesheet" type="text/css" href="syntax-highlighting.css" /> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /> <link rel="home" href="index.html" title="The Canonical Csound Reference Manual" /> <link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" /> <link rel="prev" href="portk.html" title="portk" /> <link rel="next" href="poscil.html" title="poscil" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">poscil3</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="portk.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="poscil.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="poscil3"></a> <div class="titlepage"></div> <a id="Indexposcil3" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">poscil3</span> </h2> <p>poscil3 — High precision oscillator with cubic interpolation. </p> </div> <div class="refsect1"> <a id="idm281472902692696"></a> <h2>Description</h2> <p> High precision oscillator with cubic interpolation. </p> </div> <div class="refsect1"> <a id="idm281472902621000"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>poscil3</strong></span> aamp, acps [, ifn, iphs]</pre> <pre class="synopsis">ares <span class="command"><strong>poscil3</strong></span> aamp, kcps [, ifn, iphs]</pre> <pre class="synopsis">ares <span class="command"><strong>poscil3</strong></span> kamp, acps [, ifn, iphs]</pre> <pre class="synopsis">ares <span class="command"><strong>poscil3</strong></span> kamp, kcps [, ifn, iphs]</pre> <pre class="synopsis">ires <span class="command"><strong>poscil3</strong></span> kamp, kcps [, ifn, iphs]</pre> <pre class="synopsis">kres <span class="command"><strong>poscil3</strong></span> kamp, kcps [, ifn, iphs]</pre> </div> <div class="refsect1"> <a id="idm281472902611496"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>ifn</em></span> -- (optional) function table number. This defaults to -1 which indicates a sinewave. </p> <p> <span class="emphasis"><em>iphs</em></span> (optional, default=0) -- initial phase (normalized table index 0-1). If a negative value is given initialisation of the phase is skipped. </p> </div> <div class="refsect1"> <a id="idm281472902608584"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>ares</em></span> -- output signal </p> <p> <span class="emphasis"><em>kamp</em></span>, <span class="emphasis"><em>aamp</em></span> -- the amplitude of the output signal. </p> <p> <span class="emphasis"><em>kcps</em></span>, <span class="emphasis"><em>acps</em></span> -- the frequency of the output signal in cycles per second. </p> <p> <span class="emphasis"><em>poscil3</em></span> works like <a class="link" href="poscil.html" title="poscil"><em class="citetitle">poscil</em></a>, but uses cubic interpolation. </p> <p>Note that <span class="emphasis"><em>poscil3</em></span> can use defered (non-power of two) length tables.</p> </div> <div class="refsect1"> <a id="idm281472902601448"></a> <h2>Examples</h2> <p> Here is an example of the poscil3 opcode. It uses the file <a class="ulink" href="examples/poscil3.csd" target="_top"><em class="citetitle">poscil3.csd</em></a>. </p> <div class="example"> <a id="idm281472902599672"></a> <p class="title"> <strong>Example 708. Example of the poscil3 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> <div class="refsect1"> <a id="idm281472723634200"></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 real audio input is needed too</span> <span class="c1">; For Non-realtime ouput leave only the line below:</span> <span class="c1">; -o poscil3.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> gi<span class="n">Sine</span> <span class="nb">ftgen</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="o">^</span><span class="mi">10</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">1</span> <span class="kd">instr</span> <span class="nf">1</span> k<span class="n">rnd</span> <span class="nb">randomh</span> <span class="mi">40</span><span class="p">,</span> <span class="mi">440</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">; produce random values</span> a<span class="n">in</span> <span class="nb">poscil3</span> <span class="mf">.6</span><span class="p">,</span> k<span class="n">rnd</span><span class="p">,</span> gi<span class="n">Sine</span> k<span class="n">line</span> <span class="nb">line</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">; straight line</span> a<span class="n">L</span><span class="p">,</span>a<span class="n">R</span> <span class="nb">pan2</span> a<span class="n">in</span><span class="p">,</span> k<span class="n">line</span> <span class="c1">; sent across image</span> <span class="nb">outs</span> a<span class="n">L</span><span class="p">,</span> a<span class="n">R</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">10</span> <span class="nb">e</span> <span class="nt"></CsScore></span> <span class="nt"></CsoundSynthesizer></span> </pre> </div> </div> </div> <p><br class="example-break" /> </p> <p> Here is another example of the poscil3 opcode, which uses a table filled from a sound file. It uses the file <a class="ulink" href="examples/poscil3-file.csd" target="_top"> <em class="citetitle">poscil3-file.csd</em> </a>. </p> <div class="example"> <a id="idm281472902593864"></a> <p class="title"> <strong>Example 709. Another example of the poscil3 opcode.</strong> </p> <div class="example-contents"> <div class="refsect1"> <a id="idm281472723689736"></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> <span class="c1">; Audio out Audio in No messages</span> -odac -iadc -d <span class="c1">;;;RT audio I/O</span> <span class="c1">; For Non-realtime ouput leave only the line below:</span> <span class="c1">; -o poscil3-file.wav -W ;;; for file output any platform</span> <span class="nt"></CsOptions></span> <span class="nt"><CsInstruments></span> <span class="c1">; Example written by Joachim Heintz 07/2008</span> <span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span> <span class="vg">kr</span> <span class="o">=</span> <span class="mi">4410</span> <span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span> <span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span> <span class="c1">; non-normalized function table with a sample 1</span> gi<span class="n">File</span> <span class="nb">ftgen</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="s">"fox.wav"</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">; Instrument #1 - uses poscil3 for playing samples from a function table</span> <span class="kd">instr</span> <span class="nf">1</span> k<span class="n">amp</span> <span class="o">=</span> <span class="nb">p4</span> k<span class="n">speed</span> <span class="o">=</span> <span class="nb">p5</span> i<span class="n">fn</span> <span class="o">=</span> <span class="mi">1</span> i<span class="n">skip</span> <span class="o">=</span> <span class="nb">p6</span> k<span class="n">cps</span> <span class="o">=</span> k<span class="n">speed</span> <span class="o">/</span> <span class="p">(</span><span class="nb">ftlen</span><span class="p">(</span>i<span class="n">fn</span><span class="p">)</span> <span class="o">/</span> <span class="nb">ftsr</span><span class="p">(</span>i<span class="n">fn</span><span class="p">))</span><span class="c1">; frequency of the oscillator</span> i<span class="n">phs</span> <span class="o">=</span> i<span class="n">skip</span> <span class="o">/</span> <span class="p">(</span><span class="nb">ftlen</span><span class="p">(</span>i<span class="n">fn</span><span class="p">)</span> <span class="o">/</span> <span class="nb">ftsr</span><span class="p">(</span>i<span class="n">fn</span><span class="p">))</span><span class="c1">; calculates skiptime to phase values (0-1)</span> a<span class="n">1</span> <span class="nb">poscil3</span> k<span class="n">amp</span><span class="p">,</span> k<span class="n">cps</span><span class="p">,</span> i<span class="n">fn</span><span class="p">,</span> i<span class="n">phs</span> <span class="nb">out</span> a<span class="n">1</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="mf">2.756</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">0</span> <span class="nb">i</span><span class="mi">1</span> <span class="mi">3</span> <span class="mf">2.756</span> <span class="mi">1</span> <span class="o">-</span><span class="mi">1</span> <span class="mi">0</span> <span class="nb">i</span><span class="mi">1</span> <span class="mi">6</span> <span class="mf">1.378</span> <span class="mi">1</span> <span class="mf">.5</span> <span class="mf">2.067</span> <span class="nb">e</span> <span class="nt"></CsScore></span> <span class="nt"></CsoundSynthesizer></span> </pre> </div> </div> </div> <p><br class="example-break" /> </p> </div> <div class="refsect1"> <a id="idm281472902591944"></a> <h2>See Also</h2> <p> <a class="link" href="poscil.html" title="poscil"><em class="citetitle">poscil</em></a> </p> </div> <div class="refsect1"> <a id="idm281472902589832"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Authors: John ffitch, Gabriel Maldonado</td> </tr> <tr> <td>Italy</td> </tr> </table> <p> </p> <p>New in Csound version 3.52</p> <p> variants with a-rate amplitude or frequency new in 5.16</p> <p>Function table optional in Csound version 6.00</p> <p>Skip of initialisation new in version 6.06</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="portk.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="OpcodesTop.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="poscil.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">portk </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> poscil</td> </tr> </table> </div> </body> </html>