How Dolby Volume Works.
Dolby® Volume technology maintains system playback volume at the same preferred level across all sources, from channel selections on a TV or set-top box or between connected sources such as CD, DVD players, portable digital media players or other playback devices. Dolby Volume lets the listener set the playback volume once and not have to adjust volume differences again, one volume up and down for all.

In addition, Dolby Volume lets the listener control a program’s dynamic range. For example, with the volume turned down for late-night viewing, dynamic range can be adjusted so that dialogue remains clear, and loud effects or wide dynamic music passages retain their impact and timbre without waking up the family.

Arcam and Dolby Volume

Vibrant Quality, Loud or Soft
Dolby Volume also compensates for the ear's changing sensitivity as the volume is turned up or down. It properly balances low, middle, and high frequencies to maintain all the nuances and impact of the program material regardless of playback volume level. At high or low levels, Dolby Volume guarantees a listening experience that includes all of the dynamics of the original mix.
Dolby Volume measures, analyzes, and maintains volume levels based on how people perceive sound. It examines a variety of audio parameters to maintain consistent playback levels whether switching between channels or between multiple source inputs. A sophisticated combination of spectral- and time-based loudness analysis enables it to quickly and properly correct level differences without creating compression artefacts or undesirable pumping in the audio signal.

Consistent Listening Experience
Maintaining level while compensating for the ear’s sensitivity guarantees audibility and enjoyment, all the time. During programs that include advertisements are received at the same volume without the annoying increase in volume that characterise many popular programs. Advertising slots are growing with many stations fitting more of them into a program and for a greater length of time, Dolby volume eliminates the need to constantly adjust for these sound level increases during commercial breaks.