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<font size=3>I like to think of phasing as an approximation to and
generalization of flanging, which is easier to understand. In both
cases you are basically mixing two copies of the input signal where one
copy is delayed relative to the other. This relative delay causes
cancellation ("notches") at frequencies where the two signals
are out of phase. <br><br>
- Julius<br><br>
At 02:55 AM 5/22/2014, Stuart McDonald wrote:<br>
<blockquote type=cite class=cite cite="">I've been periodically fussing
over trying to construct a phaser (the<br>
effect, not the fictional weapon) and while there's a working
ChucKian<br>
example at
<a href="http://electro-music.com/forum/viewtopic.php?t=23264" eudora="autourl">
http://electro-music.com/forum/viewtopic.php?t=23264</a> , I'd<br>
like to understand more about what's going on.<br><br>
The example uses a PoleZero filter, which may as well be called<br>
PixieWand for all I know what it actually does. There are numerous<br>
other filter UGens as well; I think there may be a whole world of<br>
filtration out there I can't even imagine.<br><br>
The ChucK documentation doesn't provide descriptions of the
mechanics<br>
of these filters. I get the impression that they're things you're<br>
expected to understand if you have a formal background in DSP, and
if<br>
you don't, well, it's a bit of a leap to get there.<br><br>
For now I'm optimistic I can get educated in some way. A 2006 post
on<br>
this subject on this list<br>
(<a href="https://lists.cs.princeton.edu/pipermail/chuck-users/2006-June/000763.html" eudora="autourl">
https://lists.cs.princeton.edu/pipermail/chuck-users/2006-June/000763.html</a>
)<br>
suggested reading Real Sound Synthesis for Interactive Applications<br>
(<a href="http://www.amazon.com/Real-Sound-Synthesis-Interactive-Applications/dp/1568811683" eudora="autourl">
http://www.amazon.com/Real-Sound-Synthesis-Interactive-Applications/dp/1568811683</a>
)<br>
by Perry R. Cook.<br><br>
The book looks promising, but I'm not sure if it tackles the subject<br>
to a depth that would be helpful. Has anyone read it and could<br>
recommend? Perry, what do you reckon? =D<br><br>
Many thanks,<br><br>
<br>
Stuart<br>
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</blockquote>
<x-sigsep><p></x-sigsep>
<br>
Julius O. Smith III <jos@ccrma.stanford.edu><br>
Professor of Music and, by courtesy, Electrical Engineering<br>
CCRMA, Stanford University<br>
<a href="http://ccrma.stanford.edu/~jos/" eudora="autourl">
http://ccrma.stanford.edu/~jos/</a> </font></body>
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