What is the difference between the Ultraphonix HRM version?

[gkgkgkrj]

I want to modify the ultraphonix circuit and make it into an hrm version. Does anyone know anything about it? Even a picture of the circuit diagram is difficult to find.

 

[Nostradoomus]

You could always build the Mahayana https://www.pedalpcb.com/product/mahayanadrive/ because the ultraphonix v1 is just a zendrive with one less knob. Don’t believe a word of Vertex’s ad copy drivel, I’d bet the HRM is just a zendrive with a clean blend and the voice knob added back on.