[sdiy] Vactrols & Lopass Gates

[Michael Ruberto]

Alright I submit, I will include some lopass gates in my new synth. 1st I 
have some questions. There are a handful of different schematics floating 
around on the web, which is the best to use as my example?
I have the original schematic drawn by buchla but it gives me a headache to 
look at. I see from the datasheets that the Vactrols all have different 
rise/fall times ranging from 2.5 to 4+ mSec. Does anybody know which were 
used on the original? Does it matter?

I plan to use an analog switch and have some samples of the ADG333.
http://www.analog.com/en/prod/0%2C2877%2CADG333A%2C00.html
Will these work alright?

Finally, any comments, advice, recommendations, on parts and construction 
much appreciated.

Thanks
M. A. Ruberto

PS: Anybody have the PCB footprint for the Vactrols?