Editing Dolby Pro Logic (section)

==Dolby Surround==
{{infobox brand
|name           = Dolby Surround
|logo           = Dolby Surround Logo.svg|
|logo_size      = 120px
|image          = 
|type           = Surround sound
|currentowner   = [[Dolby Laboratories]]
|origin         = United States
|introduced     = 1982
|discontinued   =
|markets        = Worldwide
|website        = [https://www.dolby.com/ Dolby official website]
|related        = [[Dolby Digital]]<br>[[Dolby Stereo]]
}}
'''Dolby Surround''' is the earliest consumer version of Dolby's surround sound decoding technology. It was introduced to the public in 1982 during the time home video recording formats (such as [[Betamax]] and [[VHS]]) were introducing Stereo and [[HiFi]] capability. The name Dolby Surround described the consumer passive matrix decoding technology; the professional, active-matrix cinema technology bore the name [[Dolby Stereo]]. It was capable of decoding Dolby Stereo four-channel soundtracks to three output channels (Left, Right, Surround). The Center channel was fed equally to the Left and Right speakers. The Surround channel was limited to a 100&nbsp;Hz to 7&nbsp;kHz frequency bandwidth, as dialog from the center channel could leak into the surround channel—there was as little as 3&nbsp;dB of separation between LCR and Surround channels.<ref name="dplii" />
{{clear|right}}