[sdiy] Concertmate MG-1 lfo rate mod: Part 2

[DTK]

Hello again...  Alright, I piggybacked a 10uf cap onto the existing 6uf
discharge cap, and it works like a charm :) Now I can do really looong nasty
filter sweeps... yay!

Someone had mentioned making this mod switchable, which I think is a good
idea... I'd actually like to set up something where I can have 3 selectable
ranges: normal, slow, and slooooooow :)

My questions:
- Is the effect of adding capacitance linear? For example, I have a 6 uf cap
in the circuit and the lfo runs at speed x.  If I insert an additional 6 uf
cap, will the speed be x/2?

- Is there some way that I can calibrate a circuit like this to get close to
certain tempo ranges? I'd like to be able to get some degree of accuracy for
tempo matched sweeps.

Ok, I think that's it for now. I'm off to RS to get some more stuff :)

Modding is rather addictive, isn't it?

Thanks for the help

Duane