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<a id="rspline"></a>
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<h2>
<span class="refentrytitle">rspline</span>
</h2>
<p>rspline —
Generate random spline curves.
</p>
</div>
<div class="refsect1">
<a id="idm281472894209960"></a>
<h2>Description</h2>
<p>
Generate random spline curves.
</p>
</div>
<div class="refsect1">
<a id="idm281472894206776"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>rspline</strong></span> xrangeMin, xrangeMax, kcpsMin, kcpsMax</pre>
<pre class="synopsis">kres <span class="command"><strong>rspline</strong></span> krangeMin, krangeMax, kcpsMin, kcpsMax</pre>
</div>
<div class="refsect1">
<a id="idm281472894131752"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kres, ares</em></span> -- Output signal
</p>
<p>
<span class="emphasis"><em>xrangeMin, xrangeMax</em></span> -- Range of values of random-generated points
</p>
<p>
<span class="emphasis"><em>kcpsMin, kcpsMax</em></span> -- Range of point-generation rate. Min and max limits are expressed in cps.
</p>
<p>
<span class="emphasis"><em>rspline</em></span> (random-spline-curve generator) is similar to <a class="link" href="jspline.html" title="jspline"><em class="citetitle">jspline</em></a> but output range is defined by means of two limit values. Also in this case, real output range could be a bit greater of range values, because of interpolating curves beetween each pair of random-points.
</p>
<p>
At present time generated curves are quite smooth when <span class="emphasis"><em>cpsMin</em></span> is not too different from <span class="emphasis"><em>cpsMax</em></span>. When <span class="emphasis"><em>cpsMin-cpsMax</em></span> interval is big, some little discontinuity could occurr, but it should not be a problem, in most cases. Maybe the algorithm will be improved in next versions.
</p>
<p>
These opcodes are often better than <a class="link" href="jitter.html" title="jitter"><em class="citetitle">jitter</em></a> when user wants to <span class="quote">“<span class="quote">naturalize</span>”</span> or <span class="quote">“<span class="quote">analogize</span>”</span> digital sounds. They could be used also in algorithmic composition, to generate smooth random melodic lines when used together with <a class="link" href="samphold.html" title="samphold"><em class="citetitle">samphold</em></a> opcode.
</p>
<p>
Note that the result is quite different from the one obtained by filtering white noise, and they allow the user to obtain a much more precise control.
</p>
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<div class="refsect1">
<a id="idm281472894120136"></a>
<h2>Examples</h2>
<p>
Here is an example of the rspline opcode. It uses the file <a class="ulink" href="examples/rspline.csd" target="_top"><em class="citetitle">rspline.csd</em></a>.
</p>
<div class="example">
<a id="idm281472894118280"></a>
<p class="title">
<strong>Example 845. Example of the rspline 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="idm281472714537416"></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 jspline.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>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">rangeMin</span> <span class="nb">init</span> <span class="nb">p4</span>
k<span class="n">rangeMax</span> <span class="nb">init</span> <span class="nb">p5</span>
k<span class="n">cpsmin</span> <span class="nb">init</span> <span class="mi">2</span>
k<span class="n">cpsmax</span> <span class="nb">init</span> <span class="mi">3</span>
k<span class="n">sp</span> <span class="nb">rspline</span> k<span class="n">rangeMin</span><span class="p">,</span> k<span class="n">rangeMax</span><span class="p">,</span> k<span class="n">cpsmin</span><span class="p">,</span> k<span class="n">cpsmax</span>
a<span class="n">out</span> <span class="nb">pluck</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">200</span><span class="o">+</span>k<span class="n">sp</span><span class="p">,</span> <span class="mi">1000</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span>
a<span class="n">out</span> <span class="nb">dcblock</span> a<span class="n">out</span> <span class="c1">;remove DC</span>
<span class="nb">outs</span> a<span class="n">out</span><span class="p">,</span> a<span class="n">out</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">10</span> <span class="mi">2</span> <span class="mi">5</span> <span class="c1">;a bit jitter</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">8</span> <span class="mi">10</span> <span class="mi">10</span> <span class="mi">20</span> <span class="c1">;some more</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">16</span> <span class="mi">10</span> <span class="mi">20</span> <span class="mi">50</span> <span class="c1">;lots more</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
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</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472894113992"></a>
<h2>Credits</h2>
<p>Author: Gabriel Maldonado</p>
<p>New in version 4.15</p>
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