56 Dolby® DP570 Multichannel Audio Tool User’s Manual
Using the DP570 in Postproduction Most Important Metadata
7.4 Most Important MetadataThefollowinghighest‐priorityparametershavethegreatestimpactonyourwork.We
suggestyouaddresstheminthisorder:
1. Programconfiguration:thenumberoftypeofprogramsincludedintheDolbyE
stream.
2. Channelmode:thenumberofaudiochannelsintheprogram;setitonceforeach
program.
3. Dialoguelevel:thedialnormparameter.Comparethemeasuredvalue(shownin
yellownumbers)tothedialnormmetadataparametervalue(showningreen
numbers)periodicallyasyouwork.
4. Compressionmode:selectonethatsoundsbest;Noneisnotrecommendedasitmay
causepeaklimitinginaconsumerʹsdecoderduringdownmixing.Formore
informationoncompressionmodes,seeSettingDynamicRangeControlonpage34.
Setitonceforeachprogram.
5. Surround–3dBflag:Setthisaccordingtothesettingoftheoriginalmixingroom.
Typic ally thisflagisenabledwhenamixwasbalancedonatheatricaldubbingor
mixingstagewherethesurroundchannelswereSPL‐adjustedto82andthemain
speakerswereSPL‐adjustedto85.
6. Downmixparameters:setaccordingtotaste:
•Centerdownmixlevel
• Surrounddownmixlevel
• Preferredstereodownmix
•Lt/Rtcenterdownmixlevel
•Lt/Rtsurrounddownmixlevel
•Lo/Rocenterdownmixlevel
•Lo/Rosurroundmixlevel
Note: Ensurethattheseparametersaresetcorrectlybecauseotherparametersdepend
onthem.