[sdiy] Re: [AH] Famous Fixed Filters - FFF PCB ? Moog Parametric?

[jbv]

Paul ,

> Original Message:
> "Apart from vocal sounds, I've always thought that a bunch of
> parametric filters (with a specific adsr + vca for each) could be
> used to synthesize great percussion sounds, such as gongs or
> huge pieces of metal..."
>
> I doubt it, because what percussive noises need, is non-harmonic frequencies
> (such as you might get from a ring modulator).
> The filter itself isn't going to do this.
>
> Certainly, if you had a bunch of oscillators as well, then you would be well
> in.
>

Mmmmh... According to what I obtained with a phase vocoder some years ago, I
still think
something can be achieved with white noise "colored" by a set of parametric
filters in
parallel with an adsr + vca for each... By metallic percussions, I don't mean
bells (for
which a ringmod is adequate), but rather gong-like, of industrial sounds made
by huge
pieces of metal... What I did back then was to take the audiogram of a gong and
try to
reproduce the evolution of each visible band in freq and amp, with steep bw for
each band.
And the result wasn't really a gong re-synthesis, but was quite interesting,
enough to make
me feel like doing more experiments (when I have time of course...).
AFAIR I also tried to set up a bank of oscillators whose FM inputs were fed
with white
noise... the result was less interesting...

JB