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<h2>
<span class="refentrytitle">ATScross</span>
</h2>
<p>ATScross — perform cross synthesis from ATS analysis files.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp13964960"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>ATScross</em></span> uses data from an ATS analysis file and data from an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> to perform cross synthesis.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp13959056"></a>
<h2>Syntax</h2>
<pre class="synopsis">ar <span class="command"><strong>ATScross</strong></span> ktimepnt, kfmod, iatsfile, ifn, kmylev, kbuflev, ipartials \
[, ipartialoffset, ipartialincr]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp13960248"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>iatsfile</em></span> – integer or character-string denoting a control-file derived from ATS analysis of an audio signal. An integer denotes the suffix of a file ATS.m; a character-string (in double quotes) gives a filename, optionally a full pathname. If not full-path, the file is sought first in the current directory, then in the one given by the environment variable SADIR (if defined).
</p>
<p><span class="emphasis"><em>ifn</em></span> – table number of a stored function containing a sine wave.</p>
<p><span class="emphasis"><em>ipartials</em></span> – number of partials that will be used in the resynthesis
</p>
<p><span class="emphasis"><em>ipartialoffset</em></span> (optional) – is the first partial used (defaults to 0).
</p>
<p><span class="emphasis"><em>ipartialincr</em></span> (optional) – sets an increment by which these synthesis opcodes counts up from <span class="emphasis"><em>ipartialoffset</em></span> for ibins components in the re-synthesis (defaults to 1).
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp14018496"></a>
<h2>Performance</h2>
<p><span class="emphasis"><em>ktimepnt</em></span> – The time pointer in seconds used to index the ATS file. Used for <span class="emphasis"><em>ATScross</em></span> exactly the same as for <a class="link" href="pvoc.html" title="pvoc"><em class="citetitle">pvoc</em></a>.</p>
<p>
<span class="emphasis"><em>kfmod</em></span> – an input for performing pitch transposition or frequency modulation on all of the synthesized partials, if no fm or pitch change is desired then use a 1 for this value.
</p>
<p><span class="emphasis"><em>kmylev</em></span> - scales the <span class="emphasis"><em>ATScross</em></span> component of the frequency spectrum applied to the partials from the ATS file indicated by the <span class="emphasis"><em>ATScross</em></span> opcode. The frequency spectrum information comes from the <span class="emphasis"><em>ATScross</em></span> ATS file. A value of 1 (and 0 for <span class="emphasis"><em>kbuflev</em></span>) gives the same results as <a class="link" href="ATSadd.html" title="ATSadd"><em class="citetitle">ATSadd</em></a>.
</p>
<p><span class="emphasis"><em>kbuflev</em></span> - scales the <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> component of the frequency spectrum applied to the partials from the ATS file indicated by the <span class="emphasis"><em>ATScross</em></span> opcode. The frequency spectrum information comes from the <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> ATS file. A value of 1 (and 0 for <span class="emphasis"><em>kmylev</em></span>) results in partials that have frequency information from the ATS file given by the <span class="emphasis"><em>ATScross</em></span>, but amplitudes imposed by data from the ATS file given by <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a>.
</p>
<p><span class="emphasis"><em>ATScross</em></span> uses data from an ATS analysis file (indicated by <span class="emphasis"><em>iatsfile</em></span>) and data from an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> to perform cross synthesis. <span class="emphasis"><em>ATScross</em></span> uses <span class="emphasis"><em>ktimepnt</em></span>, <span class="emphasis"><em>kfmod</em></span>, <span class="emphasis"><em>ipartials</em></span>, <span class="emphasis"><em>ipartialoffset</em></span> and <span class="emphasis"><em>ipartialincr</em></span> just like <a class="link" href="ATSadd.html" title="ATSadd"><em class="citetitle">ATSadd</em></a>. <span class="emphasis"><em>ATScross</em></span> synthesizes a sine-wave for each partial selected by the user and uses the frequency of that partial (after scaling in frequency by <span class="emphasis"><em>kfmod</em></span>) to index the table created by <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a>. Interpolation is used to get in-between values. <span class="emphasis"><em>ATScross</em></span> uses the sum of the amplitude data from its ATS file (scaled by <span class="emphasis"><em>kmylev</em></span>) and the amplitude data gained from an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> (scaled by <span class="emphasis"><em>kbuflev</em></span>) to scale the amplitude of each partial it synthesizes. Setting <span class="emphasis"><em>kmylev</em></span> to one and <span class="emphasis"><em>kbuflev</em></span> to zero will make <span class="emphasis"><em>ATScross</em></span> act exactly like <a class="link" href="ATSadd.html" title="ATSadd"><em class="citetitle">ATSadd</em></a>. Setting <span class="emphasis"><em>kmylev</em></span> to zero and <span class="emphasis"><em>kbuflev</em></span> to one will produce a sound that has all the partials selected by the <span class="emphasis"><em>ATScross</em></span> ugen, but with amplitudes taken from an <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a>. The time pointers of the <a class="link" href="ATSbufread.html" title="ATSbufread"><em class="citetitle">ATSbufread</em></a> and <span class="emphasis"><em>ATScross</em></span> do not need to be the same.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp14034056"></a>
<h2>Examples</h2>
<p>
Here is an example of the ATScross opcode. It uses the file <a class="ulink" href="examples/ATScross.csd" target="_top"><em class="citetitle">ATScross.csd</em></a>.
</p>
<div class="example">
<a id="idp14035040"></a>
<p class="title">
<strong>Example 58. Example of the ATScross 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 ATScross.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" and "fox.ats" are created by atsa</span>
ktime <span class="opc">line</span> 0, p3, 4
ktime2 <span class="opc">line</span> 0, p3, 4
kline <span class="opc">expseg</span> 0.001, .3, 1, p3<span class="op">-</span>.3, 1
kline2 <span class="opc">expseg</span> 0.001, p3, 3
<span class="opc">ATSbufread</span> ktime2, 1, "fox.ats", 20
aout <span class="opc">ATScross</span> ktime, 2, "beats.ats", 1, kline, 0.001 <span class="op">*</span> (4 <span class="op">-</span> kline2), 180
<span class="opc">outs</span> aout<span class="op">*</span>2, aout<span class="op">*</span>2
<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 4
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
<p> This example performs cross synthesis using two ATS-files, "fox.ats" and "beats.ats". The result of this will be a sound that starts out with the shape (in frequency) of fox.ats, and ends with the shape of beats.ats. All the sine-wave frequencies come from beats.ats. The <span class="emphasis"><em>kbuflev</em></span> value is scaled because the energy produced by applying fox.ats's frequency spectrum to beats.ats's partials is very large. Notice also that the time pointers of the <span class="emphasis"><em>ATSbufread</em></span> (fox.ats) and <span class="emphasis"><em>ATScross</em></span> (beats.ats) need not have the same value, this way you can read through the two ATS files at different rates.
</p>
</div>
<div class="refsect1" title="See also">
<a id="idp14037440"></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="ATSinterpread.html" title="ATSinterpread"><em class="citetitle">ATSinterpread</em></a>,
<a class="link" href="ATSpartialtap.html" title="ATSpartialtap"><em class="citetitle">ATSpartialtap</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="idp14042320"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Alex Norman</td>
</tr>
<tr>
<td>Seattle,Washington</td>
</tr>
<tr>
<td>2004</td>
</tr>
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