- Dolby Multichannel Audio Tool User's Manual

54 Dolby
®
DP570 Multichannel Audio Tool User’s Manual
Using the DP570 in Postproduction
7.4 Most Important Metadata
Thefollowinghighest‐priorityparametershavethegreatestimpactonyourwork.We
suggestyouaddresstheminthisorder:
1. Programconfiguration:ThenumberoftypeofprogramsincludedintheDolbyE
stream.
2. Channelmode:Thenumberofaudiochannelsintheprogram;setitonceforeach
program.
3. Dialoguelevel:
Comparethemeasuredvalue,showninyellownumbers,tothe
metadataparametervalue,showningreennumbers,periodicallyasyouwork.
4. Compressionmode:Selectonethatsoundsbest;Noneisnotrecommendedasitmay
causepeaklimitinginaconsumerʹsdecoderduringdownmixing.Formore
informationoncompressionmodes,
seeSection 4.8.Setitonceforeachprogram.
5. Surround–3dBflag:Setaccordingtothesettingoftheoriginalmixingroom.
Typicallythisflagisenabledwhenamixwasbalancedonatheatricaldubbingor
mixingstagewherethesurroundchannelswereSPL‐adjustedto82andthemain

speakerswereSPL‐adjustedto85.
6. Downmixparameters:Setaccordingtothecontentofyourprogramandthelikely
playbackenvironmentforeachdownmix.
•Centerdownmixlevel
• Surrounddownmixlevel
• Preferredstereodownmix
•Lt/RtCenterdownmixlevel
•Lt/Rtsurrounddownmixlevel
•Lo/RoCenterdownmixlevel
•Lo/Rosurroundmixlevel
Note: Ensurethattheseparametersaresetcorrectlybecauseotherparametersdependon
them.