AlphaPix to Dumb RGB controlle Help

[theycalmegriswald]

Needing some advice in xlights for this setup

HolidayCoro products
Alphapix 16 controller.
Alphapix RS485 output 1 and 2 going to two different 30 channel dumb rgb controllers.
These two controllers have their own universe numbers 17 & 18

Problem:
How do I designate 3 dmx channels on each universe channel for each light.
I am not seeing an option for this under E131.

I have watched 7 tutuorials on sequencing. Not finding much on dmx. Can I just use the pre-sequenced icons?

[markrvp]

In xLights, you have 10 different 3 channel "strings" on Universe 30 AND on Universe 31.    You are using 30 channels, divided by 3 (R,G,B)

Assuming 510 channels per universe, you would be at channel 14791 to begin universe 30, so...

14791-14793 are string 1
14794-14796 are string 2
14797-14799 are string 3
etc. etc. etc.