UR-C (UR22C), DSP HPF db per octave?

What is the specific setting for the high pass within the DSPmix options for the hardware? I don’t see anything in the documentation for the onboard dsp as to how hard it rolls off.

Also, how does the HPF differ in the settings menu from the one included in the channel strip?

I don’t know how steep the hpf is (a guess would be 12 dB/octave), but the setting in DSPmixfx options is to set the hp frequency of the channel strip hpf button.