StageLinq switch deck1 and 3 detection

Engine DJ Hardware Standalone Controllers
1

Prime 4+ / StageLinQ: identifying Deck 1/3 and Deck 2/4 layers

I’m experimenting with the StageLinQ protocol on a Denon Prime 4+ to read deck state externally.

Discovery and StateMap communication are working. The device reports DeckCount = 4, and I can read mixer state for all four channels (CH1–CH4).

However, the Engine StateMap appears to expose only:

/Engine/Deck1/... /Engine/Deck2/...

I don’t see /Engine/Deck3/... or /Engine/Deck4/....

When switching the physical layers 1↔3 and 2↔4, I receive StageLinQ activity, including Play/PlayState changes, but so far I haven’t found a StateMap value that explicitly identifies whether the left player is currently controlling Deck 1 or Deck 3, or whether the right player is controlling Deck 2 or Deck 4.

The capture is unfiltered, so this does not appear to be caused by filtering the StateMap messages.

Questions:

  1. Does the Prime 4+ expose the active 1/3 and 2/4 layer through StageLinQ?
  2. If so, which service/path/message contains this information?
  3. Are Deck 3/4 represented as layers of /Engine/Deck1 and /Engine/Deck2, rather than separate Engine deck objects?
  4. Is this information perhaps available through another StageLinQ service rather than StateMap?

I’m currently testing with PyStageLinQ, but information about the protocol itself would also be very helpful.

Ultimately I’d like to reliably map track/play state to the four physical mixer channels.

2

Is this the wrong place for this? Or nobody knows this?

3

There is a separate forum part for that: SoundSwitch - Engine DJ Community

But that can be moved by a forum moderator (khm @Reese ), more likely you have no response because of the nature of your questions, reverse engineering a lighting protocol.

4

Thnx for the reply.

I searched for documentation, but didn’t found. I will create a topic there if this topic isn’t moved to that section.