Audyssey EQ is a direct extension of MultEQ for products that come with attached loudspeakers such as televisions and home theater in a box systems.

Audyssey Dynamic EQ: A technology that solves the problem of deteriorating sound quality as the playback volume is decreased.

It monitors the volume in real time and maintains the desired listening level for all content while optimizing the dynamic range.

Audyssey DSX then synthesizes the necessary content for these channels to reproduce the necessary acoustical and perceptual cues that enhance soundstage rendering for surround sound.

Audyssey has an 11.2 surround sound system using DSX which adds two height and two wide left and right channels to a traditional 7.1 mix.