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<div class="refentry" title="tableshuffle">
<a id="tableshuffle"></a>
<div class="titlepage"></div>
<a id="IndexTableshuffle" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">tableshuffle</span>
</h2>
<p>tableshuffle —
shuffles the content of a function table so that each element of the source
table is put into a different random position.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp47879112"></a>
<h2>Description</h2>
<p>
This opcode can be used in order to shuffle the content of
function tables into a random order but without loosing any of
the elements. Imagine shuffling a deck of cards. Each element of
the table is copied to a different random position. If that
position was already chosen before then the next free position
is chosen. The length of the table remains the same.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp47889536"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>tableshuffle</strong></span> ktablenum</pre>
<pre class="synopsis"><span class="command"><strong>tableshufflei</strong></span> itablenum</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp47891160"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ktablenum</em></span> or <span class="emphasis"><em>itablenum</em></span>
-- the number of the table to shuffle.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp47892240"></a>
<h2>Examples</h2>
<p>
Here is an example of the tableshuffle opcode. It uses the file <a class="ulink" href="examples/farey7shuffled.csd" target="_top"><em class="citetitle">farey7shuffled.csd</em></a>.
</p>
<div class="example">
<a id="idp47933424"></a>
<p class="title">
<strong>Example 859. Example of the tableshuffle 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>
-odac -+rtaudio=alsa --midioutfile=farey7.mid
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span><span class="op">=</span>48000
<span class="ohdr">ksmps</span><span class="op">=</span>10
<span class="ohdr">nchnls</span><span class="op">=</span>1
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
gidelta <span class="opc">init</span> 100
gimult <span class="opc">init</span> 101
<span class="comment">;-------- loop and trigger instrument 901 using a Farey Sequence polyrhythm</span>
<span class="oblock">instr</span> 1
kindx <span class="opc">init</span> 0
kindx2 <span class="opc">init</span> 0
ktrigger <span class="opc">init</span> 0
ktime_unit <span class="opc">init</span> p6
kstart <span class="opc">init</span> p4
kloop <span class="opc">init</span> p5
kinitndx <span class="opc">init</span> 0
kfn_times <span class="opc">init</span> gidelta
knote <span class="opc">init</span> 60
kbasenote <span class="opc">init</span> p8
ifundam <span class="opc">init</span> p7
ktrigger <span class="opc">seqtime</span> ktime_unit, kstart, kloop, kinitndx, kfn_times
<span class="octrl">if</span> (ktrigger <span class="op">></span> 0 ) then
kpitch <span class="op">=</span> <span class="opc">cpspch</span>(ifundam)
kmult <span class="opc">tab</span> kindx2, gimult
kpitch <span class="op">=</span> kpitch <span class="op">*</span> kmult
knote <span class="op">=</span> kbasenote <span class="op">+</span> kmult
<span class="opc">event</span> "i", 901, 0, .4, .1, kpitch, kpitch <span class="op">*</span> .9, .4, 5, .75, .8, 1.0, .15, .0, .125, .125, .25, .5, 1.0, .0, .0, .0, .0, .125, .25, .25, .25, knote
kindx <span class="op">=</span> kindx <span class="op">+</span> 1
kindx <span class="op">=</span> kindx <span class="op">%</span> kloop
kindx2 <span class="op">=</span> kindx2 <span class="op">+</span> 1
kindx2 <span class="op">=</span> kindx2 <span class="op">%</span> kloop
<span class="octrl">if</span> (kindx2 <span class="op">==</span> 0) then
<span class="opc">tableshuffle</span> gimult
<span class="octrl">endif</span>
<span class="octrl">endif</span>
<span class="oblock">endin</span> <span class="comment">; 1</span>
<span class="comment">;------ basic 2 Operators FM algorithm ----------------</span>
<span class="oblock">instr</span> 901
inotedur <span class="op">=</span> p3
imaxamp <span class="op">=</span> p4 <span class="comment">;ampdb(p4)</span>
icarrfreq <span class="op">=</span> p5
imodfreq <span class="op">=</span> p6
ilowndx <span class="op">=</span> p7
indxdiff <span class="op">=</span> p8<span class="op">-</span>p7
knote <span class="op">=</span> p27
aampenv <span class="opc">linseg</span> p9, p14<span class="op">*</span>p3, p10, p15<span class="op">*</span>p3, p11, p16<span class="op">*</span>p3, p12, p17<span class="op">*</span>p3, p13
adevenv <span class="opc">linseg</span> p18, p23<span class="op">*</span>p3, p19, p24<span class="op">*</span>p3, p20, p25<span class="op">*</span>p3, p21, p26<span class="op">*</span>p3, p22
amodosc <span class="opc">oscili</span> (ilowndx<span class="op">+</span>indxdiff<span class="op">*</span>adevenv)<span class="op">*</span>imodfreq, imodfreq, 10
acarosc <span class="opc">oscili</span> imaxamp<span class="op">*</span>aampenv, icarrfreq<span class="op">+</span>amodosc, 10
<span class="opc">out</span> acarosc
<span class="comment">;------ we also write down a midi track here ----------</span>
<span class="opc">midion</span> 1, knote, 100
<span class="oblock">endin</span> <span class="comment">; 901</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span>10 0 4096 10 1
<span class="stamnt">f</span>100 0 -18 "<span class="stamnt">f</span>arey" 7 1
<span class="stamnt">f</span>101 0 -18 "<span class="stamnt">f</span>arey" 7 2
<span class="comment">; p4 kstart := index offset into the Farey Sequence</span>
<span class="comment">; p5 kloop := end index into Farey Seq.</span>
<span class="comment">; p6 timefac := time in seconds for one loop to complete</span>
<span class="comment">; p7 fundam := fundamental of the FM instrument</span>
<span class="comment">; p8 basenote:= root pitch of the midi voice output</span>
<span class="comment">; note that pitch structures of the midi file output are not equivalent to the</span>
<span class="comment">; ones used for the FM real-time synthesis.</span>
<span class="comment">; start dur kstart kloop timefac fundam. basenote</span>
<span class="stamnt">i</span>1 0.0 44 0 18 1 6.05 60
<span class="stamnt">i</span>1 4 40 0 18 3 7.05 72
<span class="stamnt">i</span>1 10 38 0 18 1.5 8 84
<span class="stamnt">i</span>1 15 50 0 18 1 5 48
<span class="stamnt">i</span>1 22 75 5 17 1.7 4 36
<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="idp47935704"></a>
<h2>See Also</h2>
<p>
<a class="link" href="GENfarey.html" title="GENfarey"><em class="citetitle">GEN farey</em></a>,
<a class="link" href="tablefilter.html" title="tablefilter"><em class="citetitle">tablefilter</em></a>,
<a class="link" href="tablecopy.html" title="tablecopy"><em class="citetitle">tablecopy</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp47937712"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Georg Boenn </td>
</tr>
<tr>
<td>University of Glamorgan, UK</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 5.13</p>
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