[PD] is this a spectral gate?

Josh Steiner josh at vitriolix.com
Thu Feb 22 01:30:48 CET 2007

Frank Barknecht wrote:
>> So basically, in most of the "simple" fft software, they split the
>> signal into freq and amplitude. You can see in the screenshot this is
>> represented by yellow and orange connectors, and they have specific
>> objects so you can play with a whole bunch of crazy transformations on
>> both freq and amp, and then you can resynthesize it back with an
>> inverse fft module.
> Yes, the same principle is in use in Pd as well, only that instead of
> phase and amplitude (often also called "magnitude") you get "real" and
> "imaginary" data in Pd. But this is only a different point of view on
> the same thing: one is a "rectangular" view the other is "polar". But
> you can convert between both views back and forth.  The DSP-Guide has
> a nicer explanation of the conversion:
> http://www.dspguide.com/ch8/8.htm

what is the advantage of spitting out these values in polar coords?

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