Haku helps his human pal Erik Ribeiro (@eriksuperlazy on Instagram) unbox and set up new modules from Infinite Machinery. Erik got these back when we were all at Knobcon. I, too, am still setting up some of the modules that I acquired there.

It appears the Infinite Machinery modules in question are the TZ (thru-zero) Dual VCO and Low Road filter.

And here they are installed and set up to make some noise.