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<div class="refentry" title="ATSpartialtap">
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<h2>
<span class="refentrytitle">ATSpartialtap</span>
</h2>
<p>ATSpartialtap — returns a frequency, amplitude pair from an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> opcode.
</p>
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<div class="refsect1" title="Description">
<a id="idp14212072"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>ATSpartialtap</em></span> takes a partial number and returns a frequency, amplitude pair. The frequency and amplitude data comes from an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> opcode.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp14206248"></a>
<h2>Syntax</h2>
<pre class="synopsis">kfrq, kamp <span class="command"><strong>ATSpartialtap</strong></span> ipartialnum</pre>
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<div class="refsect1" title="Initialization">
<a id="idp14207376"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ipartialnum</em></span> - indicates the partial that the <span class="emphasis"><em>ATSpartialtap</em></span> opcode should read from an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a>.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp14266648"></a>
<h2>Performance</h2>
<p><span class="emphasis"><em>kfrq</em></span> - returns the frequency value for the requested partial.</p>
<p><span class="emphasis"><em>kamp</em></span> - returns the amplitude value for the requested partial.</p>
<p><span class="emphasis"><em>ATSpartialtap</em></span> takes a partial number and returns a frequency, amplitude pair. The frequency and amplitude data comes from an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> opcode. This is more restricted version of <a class="link" href="ATSread.html" title="ATSread"><em class="citetitle">ATSread</em></a>, since each <a class="link" href="ATSread.html" title="ATSread"><em class="citetitle">ATSread</em></a> opcode has its own independent time pointer, and <span class="emphasis"><em>ATSpartialtap</em></span> is restricted to the data given by an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a>. Its simplicity is its attractive feature.</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp14270616"></a>
<h2>Examples</h2>
<p>
Here is an example of the ATSpartialtap opcode. It uses the file <a class="ulink" href="examples/ATSpartialtap.csd" target="_top"><em class="citetitle">ATSpartialtap.csd</em></a>.
</p>
<div class="example">
<a id="idp14271608"></a>
<p class="title">
<strong>Example 63. Example of the ATSpartialtap opcode.</strong>
</p>
<div class="example-contents">
<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 for RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o ATSpartialtap.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="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="oblock">instr</span> 1 <span class="comment">; "beats.ats" is created by atsa</span>
ktime <span class="opc">line</span> 0, p3, 2
<span class="opc">ATSbufread</span> ktime, 1, "beats.ats", 30
kfreq1, kam1 <span class="opc">ATSpartialtap</span> 5
kfreq2, kam2 <span class="opc">ATSpartialtap</span> 20
kfreq3, kam3 <span class="opc">ATSpartialtap</span> 30
aout1 <span class="opc">oscil</span> kam1, kfreq1, 1
aout2 <span class="opc">oscil</span> kam2, kfreq2, 1
aout3 <span class="opc">oscil</span> kam3, kfreq3, 1
aout <span class="op">=</span> (aout1<span class="op">+</span>aout2<span class="op">+</span>aout3)<span class="op">*</span>10 <span class="comment">; amplify some more</span>
<span class="opc">outs</span> aout, aout
<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 2
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
<p> This example here uses an <span class="emphasis"><em>ATSpartialtap</em></span>, and an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> to read partials 5, 20 and 30 from 'beats.ats'. These amplitudes and frequencies could be used to re-synthesize those partials, or something all together different.
</p>
</div>
<div class="refsect1" title="See also">
<a id="idp14273696"></a>
<h2>See also</h2>
<p><a class="link" href="ATSread.html" title="ATSread"><em class="citetitle">ATSread</em></a>,
<a class="link" href="ATSreadnz.html" title="ATSreadnz"><em class="citetitle">ATSreadnz</em></a>,
<a class="link" href="ATSinfo.html" title="ATSinfo"><em class="citetitle">ATSinfo</em></a>,
<a class="link" href="ATSsinnoi.html" title="ATSsinnoi"><em class="citetitle">ATSsinnoi</em></a>,
<a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a>,
<a class="link" href="ATScross.html" title="ATScross"><em class="citetitle">ATScross</em></a>,
<a class="link" href="ATSinterpread.html" title="ATSinterpread"><em class="citetitle">ATSinterpread</em></a>,
<a class="link" href="ATSadd.html" title="ATSadd"><em class="citetitle">ATSadd</em></a>,
<a class="link" href="ATSaddnz.html" title="ATSaddnz"><em class="citetitle">ATSaddnz</em></a></p>
</div>
<div class="refsect1" title="Credits">
<a id="idp14278552"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Alex Norman</td>
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<td>Seattle,Washington</td>
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<td>2004</td>
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