[LAD] Software sound
w.boeke at upcmail.nl
Sun Aug 31 19:13:01 UTC 2014
Sorry Fons, if you google "moog filter schematic" you will see 3 stages, where a stage is a capacitor in series with 2 transistor emitters (which have a diode V/I characteristic).
About that complicated code: I saw implentations with a lot of code lines, and preventing oscillations originating from the non-linear tanh functions needed a lot of care.
On 08/31/2014 02:03 PM, Fons Adriaensen wrote:
> 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,
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