Blackmagic Design today announced the release of a public beta of version 4.0 software update for it’s DeckLink family of uncompressed QuickTime video capture cards. DeckLink 4.0 adds support for RT Extreme and multi channel audio features in the forthcoming Apple Final Cut Pro 4 video editing application. RT Extreme adds support for real time effects built into Final Cut Pro 4, and increases the creative flexibility of the all models of DeckLink hardware. The public beta is available free of charge from Blackmagic’s Web site.