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E1.31 (sACN) sends DMX over multicast UDP, with universe numbers matching QLC+ numbers directly

Fact L2First instrument I · VJing, projection mapping, LED/DMX & videoJ · Audio-visual integration & sync

E1.31 (streaming ACN) is an ANSI protocol for DMX over Ethernet using multicast UDP on addresses 239.255.0.x (universe number) and port 5568. Unlike Art-Net, the QLC+ universe number maps directly to E1.31 universe (no offset). Unicast mode is available. E1.31 adds a priority field (0–200, default 100): receivers use data from the highest-priority source, enabling failover. Partial transmission mode sends only active channels, reducing bandwidth.

Examples

QLC+ Universe 2 outputs on multicast 239.255.0.2 at default priority 100. A backup system at priority 80 takes over only if the primary drops.

Assessment

What is the E1.31 multicast address for universe 3? How does E1.31 priority differ from Art-Net in enabling failover?

Prerequisites — understand these first

Don't confuse with

Sources

“E1.31 packets will be sent as UDP on multicast addresses like 239.255.0.x, where 'x' is the universe number selected in QLC+. The port used is 5568.”
corpus · qlc-user-manual-open-source-dmx-lighting-control · chunk 27

Taught in modules

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