[sdiy] Filter banks & variability

[jbv]

Tim,

>
> I'm thinking this is one of those times DSP can come
> to the rescue. There is a way to use FFTs to do
> filtering. That way you just draw the filter shape you
> want, and presto!
>
> I wonder if PCs are now fast enough to be able to do
> DSP stuff in real time using a sound card for I/O?

I did extensive experiments with Max-DSP, mostly
with 512 points FFT and granular amplitude control.
Sounds great at times, but it depends on the kind of
sound source. At other times it can sound really weird
(you don't recognize the sound source, but the result
isn't sonically interesting). I guess it comes from the fact
that each FFT bin isn't really a BPF...

JB