- Dolby Multichannel Audio Tool User's Manual

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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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appl ication
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