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Glossary
Channel A single addressable unit of control — usually one colour component (R, G, or B) of one pixel. Three channels = one RGB pixel.
Controller Hardware that receives DMX/E1.31/Artnet data from xLights and drives the physical lights. Examples: Falcon F16, KulpLights, Raspberry Pi running FPP.
DMX A lighting control protocol. DMX512 carries 512 channels per universe.
E1.31 (sACN) An Ethernet-based protocol for sending DMX data over a network. The most common protocol for DIY pixel shows.
Effect A visual pattern applied to a model over a time range — e.g. Chase, Twinkle, Fireworks, On, Morph.
FPP (Falcon Pi Player)
Open-source software that runs on a Raspberry Pi or BeagleBone and plays back .fseq sequence files, driving controllers over the network.
FSEQ
The binary sequence file format used by FPP. xLights renders .xsq files into .fseq for playback.
Layer Each model row in the sequencer can have multiple effect layers stacked on top of each other. Layer blending controls how they combine.
Model A named group of pixels/channels representing one physical prop — e.g. a matrix, arch, or roofline run.
Model Group A collection of models treated as a single unit for sequencing purposes.
Node One pixel (or one light in a traditional string). A node typically has 1-3 channels (RGB, RGBW, etc.).
Timing Mark A named point or range on the timeline used to snap effects to music beats, phrases, or sections.
Universe A group of 512 DMX channels. E1.31 sends one universe per multicast or unicast address.
XSQ The xLights sequence file format — an XML file containing all effect data for a show sequence.