Dolby Laboratories is a leader in audio entertainment. Dolby Digital is the “reigning standard in surround sound technology, found in thousands of cinemas and millions of homes worldwide. With Dolby Digital you experience compelling 5.1-channel surround sound whether you’re watching—a DVD or Blu-ray Disc™, TV programming, or downloaded content.”
If you’re curious about the alpha and omega of sound the folks at Dolby have some interesting content at their website. One area, namely, the “Hear From The Pros” has interviews with many stalwarts of the sound recording and film industry >, sixteen (16) interviews in all. I also recommend their Home Theater Speaker Guide, a handy reference to optimize your sound system with a step-by-step guide. You can find it here >.