optical limiter problem

[Martin Czech]

> So far, I have not experimented with a real electrical peak detector in
> front of the
> LED driver, but I have just connected elkos across the LED of the
> Vactrol. So

Maybe a real peak detector would solve the problem. It doesn't have
a lowpass characteristic, but it's hard to say since it
is nonlinear, you'll have to try.

> How are the commercial optical limiters optimized? (BTW: *are* there
> actually
> optical hard peak limiters, or do they have limited gain reduction in
> the first place ?)
> 
The only one I know is from "Green Audio" (hope i'm right).
It was tested in one of the last keyboards issues, it is combined
with a mic preamp and it is daid to have a "soft knee" charcteristic.
No real limiter.

m.c.

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