<?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>portk</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="port.html" title="port" />
<link rel="next" href="poscil3.html" title="poscil3" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">portk</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="port.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="poscil3.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry">
<a id="portk"></a>
<div class="titlepage"></div>
<a id="IndexPortk" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">portk</span>
</h2>
<p>portk —
Applies portamento to a step-valued control signal.
</p>
</div>
<div class="refsect1">
<a id="idm281472902758312"></a>
<h2>Description</h2>
<p>
Applies portamento to a step-valued control signal.
</p>
</div>
<div class="refsect1">
<a id="idm281472902756952"></a>
<h2>Syntax</h2>
<pre class="synopsis">kres <span class="command"><strong>portk</strong></span> ksig, khtim [, isig]</pre>
</div>
<div class="refsect1">
<a id="idm281472902687880"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>isig</em></span> (optional, default=0) -- initial (i.e. previous) value for internal feedback. The default value is 0.
</p>
</div>
<div class="refsect1">
<a id="idm281472902686024"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kres</em></span> -- the output signal at control-rate.
</p>
<p>
<span class="emphasis"><em>ksig</em></span> -- the input signal at control-rate.
</p>
<p>
<span class="emphasis"><em>khtim</em></span> -- half-time of the function in seconds.
</p>
<p>
<span class="emphasis"><em>portk</em></span> is like <a class="link" href="port.html" title="port"><em class="citetitle">port</em></a> except the half-time can be varied at the control rate.
</p>
</div>
<div class="refsect1">
<a id="idm281472902680520"></a>
<h2>Examples</h2>
<p>
Here is an example of the portk opcode. It uses the file <a class="ulink" href="examples/portk.csd" target="_top"><em class="citetitle">portk.csd</em></a>.
</p>
<div class="example">
<a id="idm281472902678744"></a>
<p class="title">
<strong>Example 707. Example of the portk 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="idm281472723805944"></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</span>
-odac <span class="c1">; -iadc ;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o portk.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">128</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">;Example by Andres Cabrera 2007</span>
<span class="nb">FLpanel</span> <span class="s">"Slider"</span><span class="p">,</span> <span class="mi">650</span><span class="p">,</span> <span class="mi">140</span><span class="p">,</span> <span class="mi">50</span><span class="p">,</span> <span class="mi">50</span>
gk<span class="n">val1</span><span class="p">,</span> gi<span class="n">slider1</span> <span class="nb">FLslider</span> <span class="s">"Watch me"</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">127</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">580</span><span class="p">,</span> <span class="mi">30</span><span class="p">,</span> <span class="mi">25</span><span class="p">,</span> <span class="mi">20</span>
gk<span class="n">val2</span><span class="p">,</span> gi<span class="n">slider2</span> <span class="nb">FLslider</span> <span class="s">"Move me"</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">127</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">580</span><span class="p">,</span> <span class="mi">30</span><span class="p">,</span> <span class="mi">25</span><span class="p">,</span> <span class="mi">80</span>
gk<span class="n">htim</span><span class="p">,</span> gi<span class="n">slider3</span> <span class="nb">FLslider</span> <span class="s">"khtim"</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">30</span><span class="p">,</span> <span class="mi">100</span><span class="p">,</span> <span class="mi">610</span><span class="p">,</span> <span class="mi">10</span>
<span class="nb">FLpanelEnd</span>
<span class="nb">FLrun</span>
<span class="nb">FLsetVal_i</span> <span class="mf">0.1</span><span class="p">,</span> gi<span class="n">slider3</span> <span class="c1">;set initial time to 0.1</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">val</span> <span class="nb">portk</span> gk<span class="n">val2</span><span class="p">,</span> gk<span class="n">htim</span> <span class="c1">; take the value of slider 2 and apply portamento</span>
<span class="nb">FLsetVal</span> <span class="mi">1</span><span class="p">,</span> k<span class="n">val</span><span class="p">,</span> gi<span class="n">slider1</span> <span class="c1">;set the value of slider 1 to kval</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; Play Instrument #1 for one minute.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">60</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="idm281472902674520"></a>
<h2>See Also</h2>
<p>
<a class="link" href="areson.html" title="areson"><em class="citetitle">areson</em></a>,
<a class="link" href="aresonk.html" title="aresonk"><em class="citetitle">aresonk</em></a>,
<a class="link" href="atone.html" title="atone"><em class="citetitle">atone</em></a>,
<a class="link" href="atonek.html" title="atonek"><em class="citetitle">atonek</em></a>,
<a class="link" href="port.html" title="port"><em class="citetitle">port</em></a>,
<a class="link" href="reson.html" title="reson"><em class="citetitle">reson</em></a>,
<a class="link" href="resonk.html" title="resonk"><em class="citetitle">resonk</em></a>,
<a class="link" href="tone.html" title="tone"><em class="citetitle">tone</em></a>,
<a class="link" href="tonek.html" title="tonek"><em class="citetitle">tonek</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472902664760"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Robin Whittle</td>
</tr>
<tr>
<td>Australia</td>
</tr>
<tr>
<td>May 1997</td>
</tr>
</table>
<p>
</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="port.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="poscil3.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">port </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> poscil3</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
7
>
armv7hl
>
media
>
core-release
>
by-pkgid
>
5fcfcb7517038d1f44ab4e478e6e61fa
>
files
>
2671
