[LAD] Software sound

Fons Adriaensen fons at linuxaudio.org
Sun Aug 31 13:03:23 UTC 2014

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.



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)

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