Dolby Laboratories DP570 4.11 Using Lt/Rt Input Mode, 4.12 Channel Mapping and Input Routing

34 Dolby® DP570 Multichannel Audio Tool User’s Manual

Using the DP570 Features

YousettheemulatortoFull(nodownmix)withnocompression(thedefaultforthe

Customselection).Youthenauditionafewauthoringpresetsuntilyoufindthe

combinationthatsuitstheprogrambest.Next,youswitchamongtheemulatorpresetsto

makesurethemetadatayouhaveselectedworksinavariety ofdownmixsettings.Now

youknowyouhavesettingsthatmaximizethemixingcapabilitiesforallyourpotential

listeners.

Byusingpresets,youbothsavetimeandincreasetheaccuracyofyourchecking,since

therearemultiplevariablesinboththeauthoringandemulatorsections.

4.11 Using Lt/Rt Input Mode

TheDP570providesaseparateinput(Lt/Rt)forasignalencodedinDolbySurround.When

youactivatetheLt/RtInputmode,theemulatorisfedonlybytheLt/Rtinput,andthe

DP570sendsaProLogic®decodedsignaltoyourmonitorsystem.Youcannotaltersettings

forthesignalfromtheLt/Rtinput,butyoucanusetheinputtoensurethatanLt/Rtmixis

performingasexpected.

ForanexampleofmonitoringaDolbySurroundprogramwhilecreatingmetadatafora

5.1‐channelprogram,seeUsingtheDP570inPostproductiononpage51.

4.12 Channel Mapping and Input Routing

Table 4 ‐3showshowtheDP570routesinputchannelstoemulatoroutputchannels.

Channelmappingchangesautomaticallyaccordingtotheprogramconfiguration,and

reflectshowthechannelswillbeconnectedtoaDolbyDigitalencoder.

TheDP570inputrouterenablesyoutorerouteinputchannelstoconformtothe

automaticallyassignedchannelmapping.

Theprogramnumber(1–8)identifiestheindividualprogramsassociatedwitheach

channel.So,theentry2C/2SmeansʺProgram2,Centerchannel/Program2,Surround

channel.ʺ

Caution: ChangestometadataparametersmaybemadewhileinLt/RtInputmode,but

youcannotheartheeffectofthesechanges,becausetheemulatorisdedicatedto

Lt/Rtinputsignal.Therefore,youshouldnotchangemetadatavaluesinLt/Rt

Inputmode.

Table 4-3 Input Channel Routings

Program

Configuration 1/2 3/4 5/6 7/8

5.1+2 1L/1R 1C/1LFE 1Ls/1Rs 2L/2R

5.1+2×11L/1R 1C/1LFE 1Ls/1Rs 2C/3C

4+4 1L/1R 1C/1S 2C/2S 2L/2R

4+2×2 1L/1R 1C/1S 3L/3R 2L/2R

4+2+2×1 1L/1R 1C/1S 3C/4C 2L/2R

4+4×1 1L/1R 1C/1S 4C/5C 2C/3C