[sdiy] Nonlinearities in IR3109 filters

[Aaron Lanterman]

On Wed, 2 Aug 2006, Sean Costello wrote:

>
> Is this the reason that the SH-101 has a fairly nonlinear filter? I have
> always thought that the sound of the filter was due to the IR3109 chip, but
> I always wondered why my Juno-60 filters (which use the IR3109) sounded weak
> next to the SH-101. Do any of the other Roland synths have clipping in the
> feedback path of an IR-3109? How about clipping in the feedback path of
> filters using other OTAs?

Sounds similar to the effect of the diodes in the feedback path of the 
MS-20.

- Aaron