Discussion about the Korg PolySix synthesizer

> Cut that 1K resistor (the upper one, not the lower one!) and you'll 
flatten the high frequency response!

Steady now. The actions of the mod that Korg introduced in the later 
models also applied additional changes to the feedback around the final 
op-amp. The actions of CE and C78 should also be considered - the value 
of CE may be enough to de-emphasize the increased brightness due to the 
1K resistor. C78 is interesting because its action will be dependant on 
the gain of the OTA.

I looked at the overall response of the whole output stage on my P6 by 
sweeping a single note's resonating filter across the whole audio band. 
I didn't see any major change in amplitude over the audible range.

Tony

http://takla-makan.bandcamp.com/
http://www.oakleysound.com