I just wanted to chime in and say that this is currently my favorite sequencer in VCV Rack, and I’m actually a bit embarrassed that hadn’t tried it sooner. Kudos for that.
I was curious though: There doesn’t seem to be a lot of sequencers in VCV Rack which can independently generate polyphonic output, and I was considering as to whether such a thing could be accomplished in Orca’s Heart. It seems like while polyphonic input might be difficult, or at least non-transparent without significant changes in UI, something like a polyphonic spread might be accomplished using a third algorithm parameter (a Z, imagining this could have some feasible mathematical basis), along with some way to fine-tune distribution of voices or something along those lines.
Anyway, this was something that occurred to me while playing around with muxing the four outputs into polyphony.