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<div class="refentry" title="marimba">
<a id="marimba"></a>
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<a id="IndexMarimba" class="indexterm"></a>
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<h2>
<span class="refentrytitle">marimba</span>
</h2>
<p>marimba —
Physical model related to the striking of a wooden block.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp30257112"></a>
<h2>Description</h2>
<p>
Audio output is a tone related to the striking of a wooden block as found in a marimba. The method is a physical model developed from Perry Cook but re-coded for Csound.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp30257640"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>marimba</strong></span> kamp, kfreq, ihrd, ipos, imp, kvibf, kvamp, ivibfn, idec \
[, idoubles] [, itriples]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp30268816"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ihrd</em></span> -- the hardness of the stick used in the strike. A range of 0 to 1 is used. 0.5 is a suitable value.
</p>
<p>
<span class="emphasis"><em>ipos</em></span> -- where the block is hit, in the range 0 to 1.
</p>
<p>
<span class="emphasis"><em>imp</em></span> -- a table of the strike impulses. The file <a class="ulink" href="examples/marmstk1.wav" target="_top"><em class="citetitle">marmstk1.wav</em></a> is a suitable function from measurements and can be loaded with a <a class="link" href="GEN01.html" title="GEN01"><em class="citetitle">GEN01</em></a> table. It is also available at <a class="ulink" href="ftp://ftp.cs.bath.ac.uk/pub/dream/documentation/sounds/modelling/" target="_top"><em class="citetitle">ftp://ftp.cs.bath.ac.uk/pub/dream/documentation/sounds/modelling/</em></a>.
</p>
<p>
<span class="emphasis"><em>ivfn</em></span> -- shape of vibrato, usually a sine table, created by a function
</p>
<p>
<span class="emphasis"><em>idec</em></span> -- time before end of note when damping is introduced
</p>
<p>
<span class="emphasis"><em>idoubles</em></span> (optional) -- percentage of double strikes. Default is 40%.
</p>
<p>
<span class="emphasis"><em>itriples</em></span> (optional) -- percentage of triple strikes. Default is 20%.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp30306000"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kamp</em></span> -- Amplitude of note.
</p>
<p>
<span class="emphasis"><em>kfreq</em></span> -- Frequency of note played.
</p>
<p>
<span class="emphasis"><em>kvibf</em></span> -- frequency of vibrato in Hertz. Suggested range is 0 to 12
</p>
<p>
<span class="emphasis"><em>kvamp</em></span> -- amplitude of the vibrato
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp30308424"></a>
<h2>Examples</h2>
<p>
Here is an example of the marimba opcode. It uses the file <a class="ulink" href="examples/marimba.csd" target="_top"><em class="citetitle">marimba.csd</em></a>, and <a class="ulink" href="examples/marmstk1.wav" target="_top"><em class="citetitle">marmstk1.wav</em></a>.
</p>
<div class="example">
<a id="idp30309856"></a>
<p class="title">
<strong>Example 438. Example of the marimba 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 marimba.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">ksmps</span> <span class="op">=</span> 128
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="comment">; Instrument #1.</span>
<span class="oblock">instr</span> 1
ifreq <span class="op">=</span> <span class="opc">cpspch</span>(p4)
ihrd <span class="op">=</span> 0.1
ipos <span class="op">=</span> 0.561
imp <span class="op">=</span> 1
kvibf <span class="op">=</span> 6.0
kvamp <span class="op">=</span> 0.05
ivibfn <span class="op">=</span> 2
idec <span class="op">=</span> 0.6
a1 <span class="opc">marimba</span> 20000, ifreq, ihrd, ipos, imp, kvibf, kvamp, ivibfn, idec, 20, 10
<span class="opc">outs</span> a1, a1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Table #1, the "marmstk1.wav" audio file.</span>
<span class="stamnt">f</span> 1 0 256 1 "marmstk1.wav" 0 0 0
<span class="comment">; Table #2, a sine wave for the vibrato.</span>
<span class="stamnt">f</span> 2 0 128 10 1
<span class="comment">; Play Instrument #1 for one second.</span>
<span class="stamnt">i</span> 1 0 1 8.09
<span class="stamnt">i</span> 1 + 0.5 8.00
<span class="stamnt">i</span> 1 + 0.5 7.00
<span class="stamnt">i</span> 1 + 0.25 8.02
<span class="stamnt">i</span> 1 + 0.25 8.01
<span class="stamnt">i</span> 1 + 0.25 7.09
<span class="stamnt">i</span> 1 + 0.25 8.02
<span class="stamnt">i</span> 1 + 0.25 8.01
<span class="stamnt">i</span> 1 + 0.25 7.09
<span class="stamnt">i</span> 1 + 0.3333 8.09
<span class="stamnt">i</span> 1 + 0.3333 8.02
<span class="stamnt">i</span> 1 + 0.3334 8.01
<span class="stamnt">i</span> 1 + 0.25 8.00
<span class="stamnt">i</span> 1 + 0.3333 8.09
<span class="stamnt">i</span> 1 + 0.3333 8.02
<span class="stamnt">i</span> 1 + 0.25 8.01
<span class="stamnt">i</span> 1 + 0.3333 7.00
<span class="stamnt">i</span> 1 + 0.3334 6.00
<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="idp30312168"></a>
<h2>See Also</h2>
<p>
<a class="link" href="vibes.html" title="vibes"><em class="citetitle">vibes</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp30313216"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: John ffitch (after Perry Cook)</td>
</tr>
<tr>
<td>University of Bath, Codemist Ltd.</td>
</tr>
<tr>
<td>Bath, UK</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.47</p>
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