Light up light down.

[Kipper4]

So I finally got and svf to work for me. Go me.
Thanks to Harold@Sabrotone.
My envelope detector is lighting up the vactrol leds. Plaguerised from a Duck Arse design.
My question
Which way do I want my LEDs to light up or down for the which section BP filter? LP filter?
The end goal is to combine/mix two of the filter outputs for a formant result.
I don't know if it will work out but hey I keep trying.
Thanks guys
Rich

[italianguy63]

That deserves a sausage!   

MC

[Kipper4]

I know it's taken me years to get an SVF to work.
It need some tweeking for upper and lower limits on the sweep and some standardisation on the vactrols. I'm using what ever was in the breadboard bits box.

I have a spare half of an op amp to use as a sweep up sweep down led driver.

Thanks Mark will a sausage work?
Greatful for the prize though.