This is a really interesting new pitch-modulation circuit - a tiny bit reminiscent of EQD’s Rainbow Machine - but it’s significantly adjacent to that and very much its own thing! I also much prefer this slimmer form factor here  vs the Rainbow Machine. The Mirror House is really cleverly engineered - and calls on a Smart Control topology to shape its output.

It’s best to approach it from the control topology first :

Controls - Mix (Dry>Wet Mix), Amount (Degree of Shift / Pitch ...