ODP: Filters

[Tom Duff]

> On the other hand, another approach might be to not use an FFT at all; just
> start in the frequency domain and build your oscillators as collections of
> harmonics with various amplitudes and phases
...
> incidentally, i have a big design project coming up in the next couple of
> years for my degree.  what i've been thinking of doing is sort of along
> these lines.. I'm calling it a convolution-synth for lack of a better term;
> the idea is to start in the frequency domain as described above.

Ph. Depalle and Xavier Rodet have worked out the details of how to do this --
the hairiest problem is keeping signals in phase from frame to frame so you
don't get phase cancellation when adding up the output signal.

There's a good introduction on the web at
http://cnmat.cnmat.berkeley.edu/~adrian/FFT-1/FFT-1_ICSPAT.html

-- 
Tom Duff.  At the end, one person called for an encore.