16 Jun
2013
16 Jun
'13
1:58 p.m.
On Sun, Jun 16, 2013 at 12:55:37PM +0200, Tim Goetze wrote:
The heart of many distortion pedals is a
clip|filter|clip chain, but
there are so many ways to vary or extend the scheme. For example, an
interesting approach to digital ladder filters wedges saturation
circuitry between the filter stages.
Or the (usually soft) clipping can inside the filter itself.
This happens e.g. in the 'Moog ladder' filter, where the signal
dependent emitter impedances of the transistor pairs act as the
resistors in a series of four simple RC filters.
The soft clipping that results follows a tanh() law.
Ciao,
--
FA
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