adding notch to SV filter

[Tom May]

"M.Ruberto" <indridcold at usa.net> writes:

> hi,
> 
> i'm building a standard state variable filter and i would like to have a notch
> output in addition to the HP, LP and BP. is it acceptable to obtain it by
> subtracting the BP from the input signal? or is there some less simple but
> more correct way of doing this?

Use a fader between the HP and LP outputs.  Here's a schematic for the
mod I'm using on the asm-1, it's got all of two components:

http://www.you-bastards.com/asm-1/notch.pdf

fTom.