I have a question on how pixel strings are updated when they span universes. Say for instance, one pixel string spans two universes. If I understand correctly, each of these universes come in on a separate multicast universe (based on the universe number). When does the controller know when to update the string. Scenario: universe 1 is received. Does the controller update right then (which means universe 2 could come in while it is updating). Or does it wait until both universe are received? Or is there a fixed clock output to the strings?