31 Aug
2014
31 Aug
'14
3:03 p.m.
On Sun, Aug 31, 2014 at 01:34:59PM +0100, W.Boeke wrote:
As an example of attempts to recreate digitally a
famous component
from the past I would take the Moog 3-stage lowpass filter. This was
build using diodes where their non-linearity was exploited in a
careful way, yielding a warm, rich sound. Numerous attempts have
been made to do this digitally, resulting in very complicated and
CPU-intensive algorithms.
The famous Moog 'ladder filter' has 4, not 3 stages, and doesn't use
diodes but transistor pairs as a non-linear impedance. The result is
similar to a tanh(x) function in each stage. It doesn't take very
complicated code nor excessive CPU.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)