7KHz High Pass filter

[dslocum]

Hi,

I've been playing with the state variable filter, but it's upper range seems to be limited. I don't know about the math, etc. of filter design, but can anyone suggest what filter and parameters I can use to make a 7KHz 12 db/oct high pass filter?

THanks

 

[Theremingenieur]

You feed the input signal into In 0 of the AudioFilterStateVariable object, leave In 1 unconnected. Get the high pass signal on Out 2.
Set parameters as follows: filter1.frequency(7000); filter1.resonance(0.7); filter1.octaveControl(0).
The 12dB/oct is inherent to the Chamberlin-style state variable filter.
You are done.

 

[dslocum]

Thank you.

It seems I tried setting the SVF to high frequency values in the past, but recall there was some sort of limit. I'll try it again as soon as I get a chance. Thanks for the reassurance!

Doug