Microsoft and Dolby Laboratories share a history of improving integrity of audio playback. The collaboration between two companies started when they began working together to enhance audio delivery for Xbox in 2001. Windows 7 builds on past collaboration by adding next-generation Dolby Digital Plus technology to offer high-quality multichannel audio. Available in Windows 7 Home Premium, Professional, Enterprise, and Ultimate, Dolby Digital Plus brings home theater–quality audio to PC, improving listening experience of music, movies, and TV. Dolby Digital Plus, a multichannel audio standard for DVDs and select HD broadcasts worldwide, is a high-efficiency, next-generation audio codec that maintains quality of Dolby Digital at a lower data rate and is fully compatible with all current Dolby Digital A/V receivers. To check out latest on Dolby Digital Plus in Windows 7—including Dolby videos and a dedicated Windows 7 web page and Audiodolby.com. For a complete Dolby PC demo and other PC videos.