Engadget HD pays a visit to Dolby Labs, discovers all the secrets of digital audio

Have you ever wondered what the differences between Dolby Digital Plus, Pro Logic and TrueHD were? Still trying to get your head around the evolution of digital surround sound in the past ten years? Yeah, you're not the only one so the crew over at Engadget HD made the long haul to Dolby Laboratories to learn everything there is to know about modern surround sound and what makes it work. In other words, if you are even the least bit interested in being surrounded by sound when watching movies or playing games, head on over and check it out!