Sines breaking down (was: AW: 35 - the next step)

[tomg]

> The MS-20 filter is quite different here, and I like it for being
different.
> With
> a medium level input signal and peak set to self oscillation it's almost
> like
> a sort of ring modulator - wild interaction of both signals. With more
> overdrive,
> the input signal dominates, and the self oscillation part starts to sound
> almost like hard sync. That's the -35 filter at least (and the
3-transistor
> version
> as well), but the OTA version is also described as having similar
behaviour.
> (At least concerning the ring mod / heterodyning effect.)
> 
> Against this background, reading your description of the "missing link
> version"

>The sine still breaks down if you drive it too hard

> makes me curious for more information. I think the sine "breaking down"
with
> very high input levels is a feature, asuming that you mean the same
effect
> I've described above. Like the "ring mod sound" becoming a "sync sound"
> (sort of). 
> Does that hit the point ? And where is the OTA version in that scope ?
> Both "ring mod" and "sync" -like sounds ? Or "ring mod" even when driven
> hard ? 

 As you approach oscillation a sine wave starts developing, as the res is
increased the sine starts breaking down on the tranny version, if maxed it
becomes saw/square on the bottom. The ota version stays very sine like no
matter how much res is applied. I would say the ota doesn't develop the
hard sound, as the sine stays fairly pure.

-tg