Realistic immersion requires many more channels than what current 5.1 surround sound systems provide. Audyssey researchers studied the acoustical and perceptual effects of sound reflections in several different performance venues and found that certain directions greatly enhance our sense of envelopment.
Audyssey DSX™ adds content for new wide and height channels to the standard 5.1 surround configuration. An algorithm was created to extract the information needed for these additional channels from the original stereo or 5.1 surround content. In addition, a blending of surround and front channels is performed to render a seamless and more enveloping soundstage.