Dolby Laboratories DP570

2Dolby® DP570 Multichannel Audio Tool User’s Manual

Overview Principles of Operation

level,ProLogicdecoding,andtheotherfunctionscontrolledbymetadataandexperienced

byconsumers.TheDP570’sconvenientanduser‐friendlyinterfacesimplifiesmultichannel

audioproductionandmastering.

Figure1‐1showstheaudiopathoftheDP570brokenintomajorfunctionalblocks.Features

thatcontroltheoperationofablockareconnectedtoitbyadottedline.

DigitalaudioinputontheDP570isviafourfemaleBNCconnectors,allowingatotalof

eightchannels.TheemulatorsectionoftheDP570,liketheDP571,requirestheinput

channelassignmenttoconformtoafixedSMPTE320Mdefinitionbasedupontheprogram

configurationselected.Sincepreviouslyrecordedmaterialmayarriveinformatsthatdo

notmatchthechosenprogramconfiguration,theDP570providestheabilitytoreroutethe

inputchannelstomatchtheexpectedconfiguration,allowingotherequipmenttobesent

thecorrectchannelassignment.

Theemulatorsectionprovidesthebulkoftheaudioprocessing,includingapplicationof

metadata,downmixing,andProLogicdecoding.Allpossiblelisteningoptionsallowedby

consumerdecodersareprovidedintheemulator(fromhigh‐endhometheaterstomono

TVsets).Notethattheinputstotheemulatorsectionmaybemultiple,unrelatedchannels

buttheoutputsarereferredtoasspeakerchannelsandrepresentonlytheactiveprogram

(theprogramcurrentlybeingworkedonormonitored).Oncetheinputchannel

configurationhasbeenset,theselectedactiveprogramappearsintheappropriatespeaker

channelsirrespectiveoftheprogramʹsappearanceontheinputchannels,thereby

simplifyinginstallationandintegrationintoexistingmultichannelmonitoring

environments.

Theemulatorsectionisfollowedbythebassmanagementsection,whichprovidesthe

abilitytoroutelowfrequenciestotheappropriatespeakerchannels.Theoutputofthebass

managementsectionissenttothedigitalaudio(emulator)outputsaswellastheanalog

monitorsection(iffitted).