<?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>sc_phasor</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="sc_lagud.html" title="sc_lagud" /> <link rel="next" href="sc_trig.html" title="sc_trig" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">sc_phasor</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="sc_lagud.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="sc_trig.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="sc_phasor"></a> <div class="titlepage"></div> <a id="IndexSc_phasor" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">sc_phasor</span> </h2> <p>sc_phasor — A resettable linear ramp between two levels </p> </div> <div class="refsect1"> <a id="idm281472892788424"></a> <h2>Description</h2> <p> A resettable linear ramp between two levels. Port of Supercollider's Phasor. </p> </div> <div class="refsect1"> <a id="idm281472892787128"></a> <h2>Syntax</h2> <pre class="synopsis">aindex <span class="command"><strong>sc_phasor</strong></span> xtrig, xrate, kstart, kend [, kresetPos] </pre> <pre class="synopsis">kindex <span class="command"><strong>sc_phasor</strong></span> xtrig, xrate, kstart, kend [, kresetPos] </pre> </div> <div class="refsect1"> <a id="idm281472892715160"></a> <h2>Performance</h2> <p> Phasor is a linear ramp between <span class="emphasis"><em>kstart</em></span> and <span class="emphasis"><em>kend</em></span> values. When its trigger input crosses from non-positive to positive, sc_phasor's output will jump to its reset position (or to <span class="emphasis"><em>kstart</em></span>if no reset value was given). Upon reaching the end of its ramp, sc_phasor will wrap back to its start. </p> <p> If <span class="emphasis"><em>kresetPos</em></span> is specified, this value will be used to jump to after a trigger. Otherwise, a trigger will set the position back to <span class="emphasis"><em>kstart</em></span> </p> <p> If one wants Phasor to output a signal with frequency <span class="emphasis"><em>freq</em></span> oscillating between <span class="emphasis"><em>start</em></span> and <span class="emphasis"><em>end</em></span>, then the <span class="emphasis"><em>rate</em></span> should be: </p> <div class="literallayout"> <p>(end - start) * freq / sr</p> </div> <p> </p> </div> <div class="refsect1"> <a id="idm281472892707992"></a> <h2>Examples</h2> <p> Here is an example of the sc_phasor opcode. It uses the file <a class="ulink" href="examples/sc_phasor.csd" target="_top"><em class="citetitle">sc_phasor.csd</em></a>. </p> <div class="example"> <a id="idm281472892706136"></a> <p class="title"> <strong>Example 862. Example of the sc_phasor 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="idm281472713324280"></a> <pre class="programlisting"> <span class="nt"><CsoundSynthesizer></span> <span class="nt"><CsOptions></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">128</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="mf">1.0</span> <span class="kd">instr</span> <span class="nf">1</span> k<span class="n">rate</span> <span class="nb">linseg</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">40</span> k<span class="n">trig</span> <span class="nb">metro</span> k<span class="n">rate</span> k<span class="n">x</span> <span class="nb">sc_phasor</span> k<span class="n">trig</span><span class="p">,</span> k<span class="n">rate</span><span class="o">/</span><span class="vg">kr</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span> a<span class="n">sine</span> <span class="nb">oscili</span> <span class="mf">0.2</span><span class="p">,</span> k<span class="n">x</span><span class="o">*</span><span class="mi">500</span><span class="o">+</span><span class="mi">500</span> <span class="nb">outch</span> <span class="mi">1</span><span class="p">,</span> a<span class="n">sine</span> <span class="kd">endin</span> <span class="kd">instr</span> <span class="nf">2</span> k<span class="n">rate</span> <span class="nb">linseg</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">40</span> a<span class="n">trig</span> <span class="o">=</span> <span class="nb">mpulse</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="o">/</span>k<span class="n">rate</span><span class="p">)</span> a<span class="n">x</span> <span class="nb">sc_phasor</span> a<span class="n">trig</span><span class="p">,</span> k<span class="n">rate</span><span class="o">/</span><span class="vg">sr</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span> a<span class="n">sine</span> <span class="nb">oscili</span> <span class="mf">0.2</span><span class="p">,</span> a<span class="n">x</span><span class="o">*</span><span class="mi">500</span><span class="o">+</span><span class="mi">500</span> <span class="nb">outch</span> <span class="mi">2</span><span class="p">,</span> a<span class="n">sine</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">20</span> <span class="nb">i</span><span class="mi">2</span> <span class="mi">0</span> <span class="mi">20</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="idm281472892701944"></a> <h2>See also</h2> <p> <a class="link" href="phasor.html" title="phasor"><em class="citetitle">phasor</em></a> </p> </div> <div class="refsect1"> <a id="idm281472892699896"></a> <h2>Credits</h2> <p>By: Eduardo Moguillansky 2017</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="sc_lagud.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="sc_trig.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">sc_lagud </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> sc_trig</td> </tr> </table> </div> </body> </html>