[sdiy] How to continually blend from a parallel connection of the two multi-mode resonating filters?

[Tom Wiltshire]

It might be possible to take advantage of the following facts to make  
this easier:

1) The input of filter one is always connected to the input
2) The output of filter 2 is always connected to the output

This leaves you three variable amounts to control

1) The amount of input fed to filter 2
2) The amount of filter1 output fed to the main output
3) The amount of filter1 output fed to filter2

(2) and (3) are inversely related (eg when one goes up, the other  
goes down). This would enable you to fake it by feeding filter1's  
output to filter two's input directly, and then using an inverted  
copy of (2) to cancel it out when it isn't required.
It's a bit cheeky, but it'd probably work.

T.


On 9 Jun 2009, at 17:28, James R. Coplin wrote:

> You can do this with two linked cross faders.  My brain has a  
> sneaking suspicion you could do it with one but I can't quite  
> figure it out.
>
> Signal input connects to filter1 input and one side of xfader1  
> output of filter1 to xfader1 other side and xfader2
> xfader1 output to filter2 input
> filter2 output to other side of xfader2
>
> use a double deck pot to control both and you have your continuous  
> x'fadable series and parallel outs.  I think there is an easier way  
> to do this.
>
> James R. Coplin
>