Need explanation for the working of filters in the analog circuit

[patan.gova]

Hello,
Can someone explain what are the different filters used in the below analog circuit and how the circuit work with them.

Thanks.

 

[LvW]

I suppose, kW menas kOhms?
Which kind of supply? Dual or single? The voltage divide R0 indcates single supply.
However, what is the purpose of the switch?
Switch open: The circuit resembles an (inverting) bandpass characteristic with a relatively small Q.

 

[patan.gova]

Yes,kW menas kOhms.
Can you explain me how the circuit works.
The original circuit is this

 

[LvW]

1.) Switch open: Bandpass, center frequency 1 Hz, max. gain 35 dB.
2.) Switch closed: High pass, corner frequency 30 Hz, max. gain 0 dB.
Correction: corner at 2 Hz.