MK 105 Fixed at 1KHz

:idea: I would like to make this a variable KHz from 1 to 50 KHz. If that is too complex then fixed at 30KHz would be great.

Do I change R1, R7 and C3? To get 30KHz what component values do I need?
:?
Thanks
Wetdude

This circuit requires a different filter circuit for each frequency, so making it variable is not possible.
Sorry, no values for other frequencies.