<?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>tab</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="tb.html" title="tb" />
<link rel="next" href="tabifd.html" title="tabifd" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">tab</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="tb.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="tabifd.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry">
<a id="tab"></a>
<div class="titlepage"></div>
<a id="IndexTabw_i" class="indexterm"></a>
<a id="IndexTabw" class="indexterm"></a>
<a id="IndexTab_i" class="indexterm"></a>
<a id="IndexTab" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">tab</span>
</h2>
<p>tab —
Fast table opcodes.
</p>
</div>
<div class="refsect1">
<a id="idm281472882069176"></a>
<h2>Description</h2>
<p>
Fast table opcodes. Faster than
<a class="link" href="table.html" title="table"><em class="citetitle">table</em></a> and
<a class="link" href="tablew.html" title="tablew"><em class="citetitle">tablew</em></a> because don't
allow wrap-around and limit and don't check index validity. Have
been implemented in order to provide fast access to
arrays. Support non-power of two tables (can be generated by any
GEN function by giving a negative length value).
</p>
</div>
<div class="refsect1">
<a id="idm281472882065752"></a>
<h2>Syntax</h2>
<pre class="synopsis">ir <span class="command"><strong>tab_i</strong></span> indx, ifn[, ixmode]</pre>
<pre class="synopsis">kr <span class="command"><strong>tab</strong></span> kndx, ifn[, ixmode]</pre>
<pre class="synopsis">ar <span class="command"><strong>tab</strong></span> xndx, ifn[, ixmode]</pre>
<pre class="synopsis"><span class="command"><strong>tabw_i</strong></span> isig, indx, ifn [,ixmode]</pre>
<pre class="synopsis"><span class="command"><strong>tabw</strong></span> ksig, kndx, ifn [,ixmode]</pre>
<pre class="synopsis"><span class="command"><strong>tabw</strong></span> asig, andx, ifn [,ixmode]</pre>
</div>
<div class="refsect1">
<a id="idm281472882057096"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifn</em></span> -- table number
</p>
<p>
<span class="emphasis"><em>ixmode</em></span> -- defaults to zero. If zero
<span class="emphasis"><em>xndx</em></span> and <span class="emphasis"><em>ixoff</em></span> ranges match the
length of the table; if non zero <span class="emphasis"><em>xndx</em></span> and
<span class="emphasis"><em>ixoff</em></span> have a 0 to 1 range.
</p>
<p>
<span class="emphasis"><em>isig</em></span> -- input value to write.
</p>
<p>
<span class="emphasis"><em>indx</em></span> -- table index
</p>
</div>
<div class="refsect1">
<a id="idm281472882051192"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>asig, ksig</em></span> -- input signal to write.
</p>
<p>
<span class="emphasis"><em>andx, kndx</em></span> -- table index.
</p>
<p>
<span class="emphasis"><em>tab</em></span> and <span class="emphasis"><em>tabw</em></span>
opcodes are similar to <span class="emphasis"><em>table</em></span> and
<span class="emphasis"><em>tablew</em></span>, but are faster and support tables
having non-power-of-two length.
</p>
<p>
Special care of index value must be taken into account. Index
values out of the table allocated space will crash Csound.
</p>
</div>
<div class="refsect1">
<a id="idm281472882046040"></a>
<h2>Examples</h2>
<p>
Here is an example of the tab opcode. It uses the file <a class="ulink" href="examples/tab.csd" target="_top"><em class="citetitle">tab.csd</em></a>.
</p>
<div class="example">
<a id="idm281472882044184"></a>
<p class="title">
<strong>Example 972. Example of the tab 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="idm281472703605800"></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 realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o tab.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">fn1</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="mi">1</span><span class="p">,</span> <span class="s">"flute.aiff"</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">;deferred-size table</span>
<span class="kd">instr</span> <span class="nf">1</span>
a<span class="n">tab</span> <span class="nb">init</span> <span class="mi">0</span>
i<span class="n">size</span> <span class="nb">tableng</span> <span class="mi">1</span> <span class="c1">;length of table?</span>
<span class="nb">print</span> i<span class="n">size</span>
a<span class="n">ndx</span> <span class="nb">phasor</span> <span class="mi">1</span> <span class="o">/</span> <span class="p">(</span>i<span class="n">size</span> <span class="o">/</span> <span class="vg">sr</span><span class="p">)</span>
a<span class="n">sig</span> <span class="nb">tab</span> a<span class="n">ndx</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">;has a 0 to 1 range</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</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">2.3</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="idm281472882039896"></a>
<h2>Credits</h2>
<p>Written by Gabriel Maldonado.</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="tb.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="tabifd.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">tb </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> tabifd</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
7
>
armv7hl
>
media
>
core-release
>
by-pkgid
>
5fcfcb7517038d1f44ab4e478e6e61fa
>
files
>
3003
