sACN input controlling subs sometimes (!) results in bumpy fades of LED fixtures

My first suspicion would be that there is an overlap in addresses between what you use to control the sub and what the sub controls.

If that's not it I would try to do a diagnostic setup with sACNview (you'll need an external computer connected to your lighting network). With the Scope tool you can log what an input address is doing versus what's happening on an output address. That would certainly help better understanding what you're seeing.

My first suspicion would be that there is an overlap in addresses between what you use to control the sub and what the sub controls.

If that's not it I would try to do a diagnostic setup with sACNview (you'll need an external computer connected to your lighting network). With the Scope tool you can log what an input address is doing versus what's happening on an output address. That would certainly help better understanding what you're seeing.

Thanks for your reaction! We will dive into the sACNview. The first suspicion should be a dead end, I hope. Fixture has fixed channel number [141][@5/1] [sub 141 holds the info for CH141] [event 141 {sub} {fader} @1/141 controls the sub] And so on for the other fixures we have. For the rest there are only 60 dimmers at U1 (1>60). Should be fine, no?