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<h2>
<span class="refentrytitle">ampdbfs</span>
</h2>
<p>ampdbfs —
Returns the amplitude equivalent (in 16-bit signed integer scale) of the full scale decibel (dB FS) value <span class="emphasis"><em>x</em></span>.
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<div class="refsect1" title="Description">
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<h2>Description</h2>
<p>
Returns the amplitude equivalent of the full scale decibel (dB FS) value <span class="emphasis"><em>x</em></span>. The logarithmic full scale decibel values will be converted to linear 16-bit signed integer values from −32,768 to +32,767.
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>ampdbfs</strong></span>(x) (no rate restriction)</pre>
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<div class="refsect1" title="Examples">
<a id="idp13572104"></a>
<h2>Examples</h2>
<p>
Here is an example of the ampdbfs opcode. It uses the file <a class="ulink" href="examples/ampdbfs.csd" target="_top"><em class="citetitle">ampdbfs.csd</em></a>.
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<a id="idp13573080"></a>
<p class="title">
<strong>Example 47. Example of the ampdbfs 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>
-odac <span class="comment">;;;RT audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o ampdbfs.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="oblock">instr</span> 1
idb <span class="op">=</span> p4
iamp <span class="op">=</span> <span class="opc">ampdbfs</span>(idb)
asig <span class="opc">oscil</span> iamp, 220, 1
<span class="opc">print</span> iamp
<span class="opc">outs</span> asig, asig
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">;sine wave.</span>
<span class="stamnt">f</span> 1 0 16384 10 1
<span class="stamnt">i</span> 1 0 1 -1
<span class="stamnt">i</span> 1 + 1 -5
<span class="stamnt">i</span> 1 + 1 -6
<span class="stamnt">i</span> 1 + 1 -20
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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</div>
<p><br class="example-break" />
Its output should include lines like:
</p>
<pre class="screen">
instr 1: iamp = 29204.511
instr 1: iamp = 18426.801
instr 1: iamp = 16422.904
instr 1: iamp = 3276.800</pre>
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<div class="refsect1" title="See Also">
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<h2>See Also</h2>
<p>
<a class="link" href="ampdb.html" title="ampdb"><em class="citetitle">ampdb</em></a>,
<a class="link" href="dbamp.html" title="dbamp"><em class="citetitle">dbamp</em></a>,
<a class="link" href="dbfsamp.html" title="dbfsamp"><em class="citetitle">dbfsamp</em></a>,
<a class="link" href="Zerodbfs.html" title="0dbfs"><em class="citetitle">0dbfs</em></a>
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<p>New in Csound version 4.10</p>
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