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21 <p class=
"p1"><span class=
"s1"><b>PV_ChainUGen
<span class=
"Apple-tab-span"> </span><span class=
"Apple-tab-span"> </span></b></span><b>UGens that alter FFT chains
</b></p>
22 <p class=
"p2"><br></p>
23 <p class=
"p3">"PV_ChainUGen" is an
<i>abstract class
</i> - in other words, a class that you do not use directly. Instead, use one of its subclasses. It represents
<b>phase-vocoder
</b> <a href=
"UGen.html"><span class=
"s2">UGen
</span></a>s - i.e. UGens which apply some kind of transformation to the frequency-domain signal produced by
<a href=
"FFT/FFT.html"><span class=
"s2">FFT
</span></a>.
</p>
24 <p class=
"p2"><br></p>
25 <p class=
"p3">(Strictly, this class encompasses all units whose
<em>output
</em> is an FFT chain. This is why FFT is in this group but IFFT is not - the IFFT unit outputs ordinary time-domain audio.)
</p>
26 <p class=
"p2"><br></p>
27 <p class=
"p3">For more info on using these units, see
<a href=
"FFT/FFT Overview.html"><span class=
"s2">FFT Overview
</span></a>.
</p>
28 <p class=
"p2"><br></p>
29 <p class=
"p3">To see all classes which derive from the PV_ChainUGen class, run this line:
</p>
30 <p class=
"p4"><span class=
"s3">PV_ChainUGen
</span>.allSubclasses.do(
<span class=
"s3">_
</span>.postln)
</p>