Moog filter fun

[Rob Brzykcy]

oh damn.. the holy grail!!!!! ;) but could we do it with a 303 filter?
Rob

Tony Allgood wrote:

> Hi,
>
> Some of you may remember a question I asked a few weeks back, it
> involved taking the output of a Moog ladder at different points up the
> ladder. It turned out that there was indeed a circuit out on the net
> that had done exactly this. However, it used one diff amp that was
> switched across one of the four ladder caps. I decided to use the
> existing circuit, one of my filter boards in fact, and add an additional
> buffer and difference amp circuit onto the bottom cap. The output of
> this and the other original diff amp was sent to mixer, controlled by a
> pot. The pot was arranged so that the outputs could be cross faded like
> on a DJ mixing desk. The output is amazing... it appears to be a slope
> control for the filter, from 1 pole to four pole, which was what I hoped
> it would do.