[sdiy] MS 20 FILTER

[René Schmitz]

Hi Colin, Diogo and all,

Colin Raffel wrote:

> A note about the circuit you are referring to-I have found that it  
> clips very ugly, the MS20 filter I think is supposed to sound nice  
> clipping... I believe that's because Tim E's implementation is  designed 
> for 9v (pedal use) and makes some sacrifices.  

The diode clipper is missing, that explains the clipping. Also there is 
no buffering at all for the resonance-feedback signal.

> I have never  tried this 
> circuit, but this one supposedly reflects the real MS20  filter more.
> http://www.uni-bonn.de/~uzs159/rs20.png

That circuit is an adaption to 3080s. If you put away the OP buffers and 
replace them with the ones in the 13700 and also use that for the OTAs, 
you're there.

Cheers,
  René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159