Autosquelch feature in Borg 2
2006-05-18 by Grant Richter
The Korg MS-20 added some diodes to the feedback amp used to give resonance. The effect is to have the resonance vary with the amplitude of the INPUT signal. So the resonance is self limiting, and you can max it out and it will "squelch" with input amplitude. This feature is controlled by the red option jumper on the back of the Borg 2 modules. With the jumper in place, you will probabaly get better results with the filter AFTER the VCA (assuming a subtractive patch). This way the little circuit will crank the resonance up and down for you automagically, kind of like gain riding. With the jumper moved to a single pin, it will offer all the time "rip-your-head-off" resonance like the Borg 1. Because the Borg 2 IS a Borg 1 with much faster Vactrols and the one added tweak. Some people are confused thinking this is an MS-20 style filter, but it is a Low Pass Gate with and MS-20ish gimmick. Just to clear that up.