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<h2>
<span class="refentrytitle">pvsmorph</span>
</h2>
<p>pvsmorph —
Performs morphing (or interpolation) between two source fsigs.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp39102312"></a>
<h2>Description</h2>
<p>
Performs morphing (or interpolation) between two source fsigs.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp39139440"></a>
<h2>Syntax</h2>
<pre class="synopsis">fsig <span class="command"><strong>pvsmorph</strong></span> fsig1, fsig2, kampint, kfrqint</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp39140488"></a>
<h2>Performance</h2>
<p>
The operation of this opcode is similar to that of <a class="link" href="pvcross.html" title="pvcross"><em class="citetitle">pvinterp</em></a> (q.v.),
except in using <span class="emphasis"><em>fsig</em></span>s rather than analysis files, and the absence of spectral envelope preservation.
The amplitudes and frequencies of <span class="emphasis"><em>fsig1</em></span> are interpolated with those of <span class="emphasis"><em>fsig2</em></span>,
depending on the values of <span class="emphasis"><em>kampint</em></span> and <span class="emphasis"><em>kfrqint</em></span>, respectively. These range
between 0 and 1, where 0 means <span class="emphasis"><em>fsig1</em></span> and 1, <span class="emphasis"><em>fsig2</em></span>. Anything in between will
interpolate amps and/or freqs of the two fsigs.
</p>
<p>
With this opcode, morphing can be performed on real-time audio input, by using
<a class="link" href="pvsanal.html" title="pvsanal"><em class="citetitle">pvsanal</em></a> to generate <span class="emphasis"><em>fsig1</em></span> and <span class="emphasis"><em>fsig2</em></span>.
These must have the same format.
</p>
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</td>
<th align="left">Warning</th>
</tr>
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<td align="left" valign="top">
<p>
It is unsafe to use the same f-variable for both input and output of pvs opcodes. Using the same one might lead to undefined behavior on some opcodes. Use a different one on the left and right sides of the opcode.
</p>
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<div class="refsect1" title="Examples">
<a id="idp39145416"></a>
<h2>Examples</h2>
<p>
Here is an example of the pvsmorph opcode. It uses the file <a class="ulink" href="examples/pvsmorph.csd" target="_top"><em class="citetitle">pvsmorph.csd</em></a>.
</p>
<div class="example">
<a id="idp39146400"></a>
<p class="title">
<strong>Example 670. Example of the pvsmorph 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</span>
-odac <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 pvsmorph.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> 16
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="comment">;; example written by joachim heintz 2009</span>
giSine <span class="ohdr">ftgen</span> 0, 0, 4096, 10, 1
<span class="oblock">instr</span> 1
iampint1 <span class="op">=</span> p4
iampint2 <span class="op">=</span> p5
ifrqint1 <span class="op">=</span> p6
ifrqint2 <span class="op">=</span> p7
kampint <span class="opc">linseg</span> iampint1, p3, iampint2
kfrqint <span class="opc">linseg</span> ifrqint1, p3, ifrqint2
ifftsize <span class="op">=</span> 1024
ioverlap <span class="op">=</span> ifftsize <span class="op">/</span> 4
iwinsize <span class="op">=</span> ifftsize
iwinshape <span class="op">=</span> 1<span class="comment">; von-Hann window</span>
Sfile1 <span class="op">=</span> "fox.wav"
ain1 <span class="opc">soundin</span> Sfile1
ain2 <span class="opc">buzz</span> .2, 50, 100, giSine
fftin1 <span class="opc">pvsanal</span> ain1, ifftsize, ioverlap, iwinsize, iwinshape
fftin2 <span class="opc">pvsanal</span> ain2, ifftsize, ioverlap, iwinsize, iwinshape
fmorph <span class="opc">pvsmorph</span> fftin1, fftin2, kampint, kfrqint
aout <span class="opc">pvsynth</span> fmorph
<span class="opc">out</span> aout <span class="op">*</span> .5
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 3 0 0 1 1
<span class="stamnt">i</span> 1 3 3 1 0 1 0
<span class="stamnt">i</span> 1 6 3 0 1 0 1
<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>
Here is another example of the pvsmorph opcode. It uses the file <a class="ulink" href="examples/pvsmorph2.csd" target="_top"><em class="citetitle">pvsmorph2.csd</em></a>.
</p>
<div class="example">
<a id="idp39149232"></a>
<p class="title">
<strong>Example 671. Example of the pvsmorph 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>
-odac
<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> 16
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="comment">;; example written by joachim heintz 2009</span>
<span class="comment">; this example uses the files "flute-C-octave0.wav" and</span>
<span class="comment">; "saxophone-alto-C-octave0.wav" from www.archive.org/details/OpenPathMusic44V2</span>
giSine <span class="ohdr">ftgen</span> 0, 0, 4096, 10, 1
<span class="oblock">instr</span> 1
iampint1 <span class="op">=</span> p4<span class="comment">; value for interpolating the amplitudes at the beginning ...</span>
iampint2 <span class="op">=</span> p5<span class="comment">; ... and at the end</span>
ifrqint1 <span class="op">=</span> p6<span class="comment">; value for unterpolating the frequencies at the beginning ...</span>
ifrqint2 <span class="op">=</span> p7<span class="comment">; ... and at the end</span>
kampint <span class="opc">linseg</span> iampint1, p3, iampint2
kfrqint <span class="opc">linseg</span> ifrqint1, p3, ifrqint2
ifftsize <span class="op">=</span> 1024
ioverlap <span class="op">=</span> ifftsize <span class="op">/</span> 4
iwinsize <span class="op">=</span> ifftsize
iwinshape <span class="op">=</span> 1<span class="comment">; von-Hann window</span>
Sfile1 <span class="op">=</span> "flute<span class="op">-</span>C<span class="op">-</span>octave0.wav"
Sfile2 <span class="op">=</span> "saxophone<span class="op">-</span>alto<span class="op">-</span>C<span class="op">-</span>octave0.wav"
ain1 <span class="opc">soundin</span> Sfile1
ain2 <span class="opc">soundin</span> Sfile2
fftin1 <span class="opc">pvsanal</span> ain1, ifftsize, ioverlap, iwinsize, iwinshape
fftin2 <span class="opc">pvsanal</span> ain2, ifftsize, ioverlap, iwinsize, iwinshape
fmorph <span class="opc">pvsmorph</span> fftin1, fftin2, kampint, kfrqint
aout <span class="opc">pvsynth</span> fmorph
<span class="opc">out</span> aout <span class="op">*</span> .5
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2<span class="comment">; moving randomly in certain borders between two spectra</span>
iampintmin <span class="op">=</span> p4<span class="comment">; minimum value for amplitudes</span>
iampintmax <span class="op">=</span> p5<span class="comment">; maximum value for amplitudes</span>
ifrqintmin <span class="op">=</span> p6<span class="comment">; minimum value for frequencies</span>
ifrqintmax <span class="op">=</span> p7<span class="comment">; maximum value for frequencies</span>
imovefreq <span class="op">=</span> p8<span class="comment">; frequency for generating new random values</span>
kampint <span class="opc">randomi</span> iampintmin, iampintmax, imovefreq
kfrqint <span class="opc">randomi</span> ifrqintmin, ifrqintmax, imovefreq
ifftsize <span class="op">=</span> 1024
ioverlap <span class="op">=</span> ifftsize <span class="op">/</span> 4
iwinsize <span class="op">=</span> ifftsize
iwinshape <span class="op">=</span> 1<span class="comment">; von-Hann window</span>
Sfile1 <span class="op">=</span> "flute<span class="op">-</span>C<span class="op">-</span>octave0.wav"
Sfile2 <span class="op">=</span> "saxophone<span class="op">-</span>alto<span class="op">-</span>C<span class="op">-</span>octave0.wav"
ain1 <span class="opc">soundin</span> Sfile1
ain2 <span class="opc">soundin</span> Sfile2
fftin1 <span class="opc">pvsanal</span> ain1, ifftsize, ioverlap, iwinsize, iwinshape
fftin2 <span class="opc">pvsanal</span> ain2, ifftsize, ioverlap, iwinsize, iwinshape
fmorph <span class="opc">pvsmorph</span> fftin1, fftin2, kampint, kfrqint
aout <span class="opc">pvsynth</span> fmorph
<span class="opc">out</span> aout <span class="op">*</span> .5
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 3 0 0 1 1<span class="comment">; amplitudes from flute, frequencies from saxophone</span>
<span class="stamnt">i</span> 1 3 3 1 1 0 0<span class="comment">; amplitudes from saxophone, frequencies from flute</span>
<span class="stamnt">i</span> 1 6 3 0 1 0 1<span class="comment">; amplitudes and frequencies moving from flute to saxophone </span>
<span class="stamnt">i</span> 1 9 3 1 0 1 0<span class="comment">; amplitudes and frequencies moving from saxophone to flute</span>
<span class="stamnt">i</span> 2 12 3 .2 .8 .2 .8 5<span class="comment">; amps and freqs moving randomly between the two spectra</span>
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp39151512"></a>
<h2>See Also</h2>
<p>
<a class="link" href="pvsanal.html" title="pvsanal"><em class="citetitle">pvsanal</em></a>,
<a class="link" href="pvsynth.html" title="pvsynth"><em class="citetitle">pvsynth</em></a>,
<a class="link" href="pvsadsyn.html" title="pvsadsyn"><em class="citetitle">pvsadsyn</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp39153488"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Victor Lazzarini</td>
</tr>
<tr>
<td>April 2007 </td>
</tr>
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<p>
New in Csound 5.06
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