[sdiy] What sort of filter is this?

[Neil Johnson]

Hi,

Mike Beauchamp wrote: 
> Excuse me if I get a few of the terms wrong here, but what sort of
> filter is neutral at it's middle position and then a high-pass and
> low-pass filter on either end?

Depends - could be bandpass or notch depending on which end the LP and HP filters are.

> The reason I ask is that I'm looking for an analog variable filter to
> add in the feedback path of a delay... I'd like to be able to have a
> single knob where the centre position is basically unaffected and I
> can either cut bass or cut treble. I'm not too sure if I'd want

...?  I think you forgot to finish that sentence.

One knob .. tricky.

> Maybe I can even go a simple route and do it all passively somehow?
> (Maybe with a centre-tapped pot, or dual gang pot?)

Something like a Baxandall tone control?  Google it.

Neil
--
http://www.njohnson.co.uk