[sdiy] How do i make a simple filter resonant ?

[Michael Buchstaller]

>Some amount of damping or limiting of the feed back "may" be needed to
>prevent the filter from driving the signal right in to extreme clipping (no
>more sound).

OK, so i need a simple VCA in the feedback path to achieve Voltage Controlled Q ?

(interesting description snippde)
>Typically this causes the low frequencies to be "killed" when you turn up
>the resonance (assuming the feed back is taken from a LP output).
>When there is a BP output the feed back can be taken from there, so there is
>no low frequency loss.

So, in the simplest way, i could invert the output and add it to the input signal ?


-Michael Buchstaller