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<h2>
<span class="refentrytitle">randomh</span>
</h2>
<p>randomh —
Generates random numbers with a user-defined limit and holds them for a period of time.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp39933400"></a>
<h2>Description</h2>
<p>
Generates random numbers with a user-defined limit and holds them for a period of time.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp39934104"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>randomh</strong></span> kmin, kmax, xcps [,imode] [,ifirstval]</pre>
<pre class="synopsis">kres <span class="command"><strong>randomh</strong></span> kmin, kmax, kcps [,imode] [,ifirstval]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp39945336"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>imode</em></span> (optional, default=0) -- generation mode of the
first output value (see below)
</p>
<p>
<span class="emphasis"><em>ifirstval</em></span> (optional, default=0) -- first output value
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp39946696"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kmin</em></span> -- minimum range limit
</p>
<p>
<span class="emphasis"><em>kmax</em></span> -- maximum range limit
</p>
<p>
<span class="emphasis"><em>kcps, xcps</em></span> -- rate of random break-point generation
</p>
<p>
The <span class="emphasis"><em>randomh</em></span> opcode is similar to <a class="link" href="randh.html" title="randh"><em class="citetitle">randh</em></a> but allows the user to set arbitrary minimum and maximum values.
</p>
<p>
When <span class="emphasis"><em>imode</em></span> = 0 (the default), the <span class="emphasis"><em>kmin</em></span>
argument value is outputted during <span class="emphasis"><em>1/kcps</em></span> (resp.
<span class="emphasis"><em>1/xcps</em></span>) seconds at the beginning of the note. Then,
the normal process takes place with a new random number generated and held
every <span class="emphasis"><em>1/kcps</em></span> (resp. <span class="emphasis"><em>1/xcps</em></span>) seconds.
</p>
<p>
When <span class="emphasis"><em>imode</em></span> = 2, the <span class="emphasis"><em>ifirstval</em></span>
argument value is outputted during <span class="emphasis"><em>1/kcps</em></span> (resp.
<span class="emphasis"><em>1/xcps</em></span>) seconds at the beginning of the note. Then,
the normal process takes place with a new random number generated and held
every <span class="emphasis"><em>1/kcps</em></span> (resp. <span class="emphasis"><em>1/xcps</em></span>) seconds.
</p>
<p>
When <span class="emphasis"><em>imode</em></span> = 3, the generation process begins with a
random value from the initialization time.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp39988552"></a>
<h2>Examples</h2>
<p>
Here is an example of the randomh opcode. It uses the file <a class="ulink" href="examples/randomh.csd" target="_top"><em class="citetitle">randomh.csd</em></a>.
</p>
<div class="example">
<a id="idp39989528"></a>
<p class="title">
<strong>Example 700. Example of the randomh 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</span>
-odac -iadc <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 randomh.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="ohdr">seed</span> 0
<span class="comment">; Instrument #1.</span>
<span class="oblock">instr</span> 1
<span class="comment">; Choose a random frequency between 220 and 440 Hz.</span>
<span class="comment">; Generate new random numbers at 10 Hz.</span>
kmin <span class="opc">init</span> 220
kmax <span class="opc">init</span> 440
kcps <span class="opc">init</span> 10
imode <span class="op">=</span> p4
ifstval <span class="op">=</span> p5
<span class="opc">printf_i</span> "\nMode: %d\n", 1, imode
k1 <span class="opc">randomh</span> kmin, kmax, kcps, imode, ifstval
<span class="opc">printk2</span> k1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Play Instrument #1 for one second,</span>
<span class="comment">; each time with a different mode.</span>
<span class="stamnt">i</span> 1 0 1
<span class="stamnt">i</span> 1 1 1 2 330
<span class="stamnt">i</span> 1 2 1 3
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
Its output should include lines like this:
</p>
<pre class="screen">
Mode: 0
i1 220.00000
i1 396.26079
i1 240.75446
i1 364.24577
...
Mode: 2
i1 330.00000
i1 416.50935
i1 356.11619
i1 433.59324
...
Mode: 3
i1 261.17741
i1 402.00891
i1 393.86592
i1 307.19839
...</pre>
<p>
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp39992432"></a>
<h2>See Also</h2>
<p>
<a class="link" href="randh.html" title="randh"><em class="citetitle">randh</em></a>,
<a class="link" href="random.html" title="random"><em class="citetitle">random</em></a>,
<a class="link" href="randomi.html" title="randomi"><em class="citetitle">randomi</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp39994432"></a>
<h2>Credits</h2>
<p>Author: Gabriel Maldonado</p>
<p>Arguments <span class="emphasis"><em>imode</em></span> and <span class="emphasis"><em>ifirstval</em></span>
added by François Pinot, Jan. 2011, after a discussion with Peiman Khosravi on
the csnd list.</p>
<p>Example written by Kevin Conder, adapted for new args by François Pinot.</p>
</div>
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