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Dolby Laboratories DP570 Stereo System User Manual

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Dolby

®

DP570 Multichannel Audio Tool User’s Manual 1

Chapter 1

Overview

TheDolby

®

DP570providesunprecedentedcontrolandreferencemonitoringforthe

creationanddeliveryofDolbyDigitalandDolbyEsurroundsoundaswellasmetadatafor

DTVandDVDs.

TheDP570MultichannelAudioToolsimplifiesthepreparationofcontentforDolbyEand

DolbyDigitalencoding.Itsabilitytocontroland

configurethemonitoringenvironment

anditsabilitytosetandeditmetadataparametersmakesitakeytoolforpostproduction,

DVD,anddigitaltelevisionfacilities.Youcanmonitorexactlywhattheconsumer

ultimatelyhearsinrealti me,withouttheneedtodecodeandreencodematerial.

Theconvenientinterfaceletsyoutake

fulladvantageoftheaudiometadatathatDolby

Digitalbitstreamsdelivertoconsumerdecoders,ensuringthathomelistenershear

programsexactlyasoriginallyintended.TheDP570enablestheusertocreatenew

metadata,andtomodifyanypreviouslygeneratedmetadata.Itsbuilt‐inLeq(A)meter

providesthecrucialabilitytodetermine

andsetthedialoguenormalization(dialnorm)

value.TheDP570outputsmetadataasaseparatedatastream,tobecombinedlaterwith

themultichannelaudioinaDolbyEorDolbyDigitalencoder.

1.1 Analog Monitoring Capabilities

TheDP570isparticularlyusefulinconjunctionwithaudioconsoleslackingadequate

multichannelmonitoringfacilities.Withtheadditionofthehigh‐performance24‐bitCat.

No.548AnalogOptionCard,independent5.1‐channel,two‐channel,andmonooutputs

areavailabletofeedthreeseparatespeakersystems.Thecardalsogivesusers

controlover

levels,channelmutes,andchannelsolosthroughamastervolumecontrol,speakertrim

controls,andaninputforaconsolesolo bus.

AnadditionalinputandintegratedDolbyProLogic

®

IIandProLogicdecodersallow

propermonitoringofLt/Rtsourcesanddownmixesfromallotherinputs.

1.2 Remote Control Capabilities

TheDP570containsextensiveGPI/Ocontrolandincludesasoftwareremoteapplication

forusewithaWindows

®

‐basedPC.TheoptionalCat.No.549GPI/OControllerprovides

keyremotecontrolfunctions.

1.3 Principles of Operation

UntiltheDP570,theonlywaytoheartheeffectofmetadataonaudioduringmasteringwas

topasstheaudiothroughtheDolbyDigitalencode/decodechain.Thisprocedurecouldnot

beachievedinrealtimeandofferedanunwieldyinterface.TheDP570providesthis

functioninrealtimebyapplying

metadataparameterstobasebandPCMaudio.This

emulationfunctionallowsyoutopreviewtheeffectsofdownmixing,settingdialogue

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