[sdiy] LFO inertia

[rkmoore at memphis.edu]

Hi Anthony,

You can limit the slew of your LFO rate CV using a simple "resistor in 
series with a capacitor to ground" set up.  Pick your R and C for the 
desired slew rate, or use a potentiometer as the resistor to have a 
variable slew rate.  

I'd have to see the LFO circuit that you're using to see what you mean 
to do with a vactrol to cause slew rate limiting.

Richard Moore

----- Original Message -----
From: "anthony" <aankrom at bluemarble.net>
Date: Tuesday, February 22, 2005 9:04 pm
Subject: [sdiy] LFO inertia

> I'm working on a sort-of chorus in which I want to modulate the 
> 'rate' LFO 
> with another LFO (is there a chorus design, commercial or 
> otherwise that 
> does this? I mean it wouldn't take a genius to think of it or 
> anything but I 
> don't think I've ever seen it).
> 
> More and more I've found myself sweeping the rate control like it 
> was a 
> Leslie speaker speeding up or slowing down. What I want to do is 
> have the 
> control lag regardless of how fast the knob is turned (but with 
> the 
> aforementioned LFO off) - like a rotating cabinet would do. I 
> thought about 
> using a Vactrol-ish thing but those have a pretty fast attack 
> relative to 
> their decay. Which /would/ actually be like real life since I 
> think a 
> speaker spins up faster than it winds down, but would it be enough 
> I wonder? 
> I have some teeny incandescant bulbs. Might those work? Or am I 
> overlooking 
> a simple way to do it?
> 
> 
>