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<a id="gogobel"></a>
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<h2>
<span class="refentrytitle">gogobel</span>
</h2>
<p>gogobel —
Audio output is a tone related to the striking of a cow bell or similar.
</p>
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<div class="refsect1">
<a id="idm281472926865832"></a>
<h2>Description</h2>
<p>
Audio output is a tone related to the striking of a cow bell or similar. The method is a physical model developed from Perry Cook, but re-coded for Csound.
</p>
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<div class="refsect1">
<a id="idm281472926864120"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>gogobel</strong></span> kamp, kfreq, ihrd, ipos, imp, kvibf, kvamp, ivfn</pre>
</div>
<div class="refsect1">
<a id="idm281472926808872"></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>
</div>
<div class="refsect1">
<a id="idm281472926801416"></a>
<h2>Performance</h2>
<p>
A note is played on a cowbell-like instrument, with the arguments as below.
</p>
<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>
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<div class="refsect1">
<a id="idm281472926796312"></a>
<h2>Examples</h2>
<p>
Here is an example of the gogobel opcode. It uses the file <a class="ulink" href="examples/gogobel.csd" target="_top"><em class="citetitle">gogobel.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="idm281472926793608"></a>
<p class="title">
<strong>Example 387. Example of the gogobel 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="idm281472756642088"></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 gogobel.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">freq</span> <span class="o">=</span> <span class="mi">200</span>
i<span class="n">hrd</span> <span class="o">=</span> <span class="mf">0.5</span>
i<span class="n">pos</span> <span class="o">=</span> <span class="nb">p4</span>
k<span class="n">vibf</span> <span class="o">=</span> <span class="mf">6.0</span>
k<span class="n">vamp</span> <span class="o">=</span> <span class="mf">0.3</span>
a<span class="n">sig</span> <span class="nb">gogobel</span> <span class="mf">.9</span><span class="p">,</span> k<span class="n">freq</span><span class="p">,</span> i<span class="n">hrd</span><span class="p">,</span> i<span class="n">pos</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">6.0</span><span class="p">,</span> <span class="mf">0.3</span><span class="p">,</span> <span class="mi">2</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">;audio file</span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">256</span> <span class="mi">1</span> <span class="s">"marmstk1.wav"</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="c1">;sine wave for the vibrato</span>
<span class="nb">f</span> <span class="mi">2</span> <span class="mi">0</span> <span class="mi">128</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mf">0.5</span> <span class="mf">0.5</span> <span class="mf">0.01</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="o">+</span> <span class="mf">0.5</span> <span class="mf">0.561</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="o">+</span> <span class="mf">0.5</span> <span class="mf">0.9</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1">
<a id="idm281472926789384"></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>
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<p>
</p>
<p>New in Csound version 3.47</p>
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