Dolby Laboratories DP570 user manual Overview

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DVDproduction.
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time,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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OutputCard,independent5.1‐channel,2‐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