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<h2>
<span class="refentrytitle">table</span>
</h2>
<p>table —
Accesses table values by direct indexing.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp47200624"></a>
<h2>Description</h2>
<p>
Accesses table values by direct indexing.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp47242744"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>table</strong></span> andx, ifn [, ixmode] [, ixoff] [, iwrap]</pre>
<pre class="synopsis">ires <span class="command"><strong>table</strong></span> indx, ifn [, ixmode] [, ixoff] [, iwrap]</pre>
<pre class="synopsis">kres <span class="command"><strong>table</strong></span> kndx, ifn [, ixmode] [, ixoff] [, iwrap]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp47245304"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifn</em></span> -- function table number.
</p>
<p>
<span class="emphasis"><em>ixmode</em></span> (optional) -- index data mode. The default value is 0.
</p>
<div class="itemizedlist">
<ul class="itemizedlist" type="disc">
<li class="listitem">
<p>0 = raw index</p>
</li>
<li class="listitem">
<p>1 = normalized (0 to 1)</p>
</li>
</ul>
</div>
<p>
</p>
<p>
<span class="emphasis"><em>ixoff</em></span> (optional) -- amount by which index is to be offset. For a table with origin at center, use tablesize/2 (raw) or .5 (normalized). The default value is 0.
</p>
<p>
<span class="emphasis"><em>iwrap</em></span> (optional) -- wraparound index flag. The default value is 0.
</p>
<div class="itemizedlist">
<ul class="itemizedlist" type="disc">
<li class="listitem">
<p>0 = nowrap (index < 0 treated as index=0; index > tablesize sticks at index=size)</p>
</li>
<li class="listitem">
<p>1 = wraparound.</p>
</li>
</ul>
</div>
<p>
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp47249544"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>table</em></span> invokes table lookup on behalf of init, control or audio indices. These indices can be raw entry numbers (0,l,2...size - 1) or scaled values (0 to 1-e). Indices are first modified by the offset value then checked for range before table lookup (see <span class="emphasis"><em>iwrap</em></span>). If index is likely to be full scale, or if interpolation is being used, the table should have an extended guard point. <span class="emphasis"><em>table</em></span> indexed by a periodic phasor ( see <a class="link" href="phasor.html" title="phasor"><em class="citetitle">phasor</em></a>) will simulate an oscillator.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp47251696"></a>
<h2>Examples</h2>
<p>
Here is an example of the table opcode. It uses the file <a class="ulink" href="examples/table.csd" target="_top"><em class="citetitle">table.csd</em></a>.
</p>
<div class="example">
<a id="idp47252664"></a>
<p class="title">
<strong>Example 847. Example of the table 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>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o table.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Initialize the global variables.</span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="comment">; Instrument #1.</span>
<span class="oblock">instr</span> 1
<span class="comment">; Vary our index linearly from 0 to 1.</span>
kndx <span class="opc">line</span> 0, p3, 1
<span class="comment">; Read Table #1 with our index.</span>
ifn <span class="op">=</span> 1
ixmode <span class="op">=</span> 1
kfreq <span class="opc">table</span> kndx, ifn, ixmode
<span class="comment">; Generate a sine waveform, use our table values </span>
<span class="comment">; to vary its frequency.</span>
a1 <span class="opc">oscil</span> 20000, kfreq, 2
<span class="opc">out</span> a1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Table #1, a line from 200 to 2,000.</span>
<span class="stamnt">f</span> 1 0 1025 -7 200 1024 2000
<span class="comment">; Table #2, a sine wave.</span>
<span class="stamnt">f</span> 2 0 16384 10 1
<span class="comment">; Play Instrument #1 for 2 seconds.</span>
<span class="stamnt">i</span> 1 0 2
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp47254936"></a>
<h2>See Also</h2>
<p>
<a class="link" href="tablei.html" title="tablei"><em class="citetitle">tablei</em></a>,
<a class="link" href="table3.html" title="table3"><em class="citetitle">table3</em></a>,
<a class="link" href="oscil1.html" title="oscil1"><em class="citetitle">oscil1</em></a>,
<a class="link" href="oscil1i.html" title="oscil1i"><em class="citetitle">oscil1i</em></a>,
<a class="link" href="osciln.html" title="osciln"><em class="citetitle">osciln</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp47257872"></a>
<h2>Credits</h2>
<p>Example written by Kevin Conder.</p>
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distrib
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Mageia
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x86_64
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media
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core-release
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b707d9a4ee443103660a75ccb6e51334
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