.DCK File Extension

File created by Resolume, a program used to create live audio-visual performances; contains a "deck," which is made up of channels, each of which use visual sources, such as video clips, flash animations, live video feeds, and raster images; used to store a pre-configured collection of visual materials and their properties.

Resolume allows users to interact with the deck while playing. DCK files are commonly manipulated during live performances and nightclub parties by visual jockeys.