- Dolby Multichannel Audio Tool User's Manual

48 Dolby
®
DP570 Multichannel Audio Tool User’s Manual
Using the DP570 in Live Remote Broadcast
6.2.2 Monitoring the Dialogue Level
Asyouwork,checkthedialoguelevelindicators—theyellownumbersshownin
Figure 6‐3—frequently.Makeadjustmentstothemixtokeepthedialoguelevelvalue
(duringperiods ofrepresentativespeech)withinafewdecibelsofyourtarget.
6.2.3 Monitoring Downmixes
Checkdownmixesoccasionallyand makesuretheannouncerandotherimportantspeech
elementsarenotburiedduringstereodownmixingorProLogicdecoding.
6.3 Using the DP570 with Other Dolby Equipment
TheCat.No.549GPI/OControllerallowsquickchangesofdownmixandcompression
modeswhilemonitoring.TheDP570canbeusedeitherwiththeDP569DolbyDigitalor
DP571DolbyEEncodersbyattachingthemetadataconnectors.
6.4 Using Unity Gain Mode
UnityGainmode,detailedinSection 4.16,allowstheoutputoftheDP570tomatch
preprocessedsignalstosimplifycomparisonsduringthemixingprocess.
6.5 Monitoring 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DynamicRangeControlonpage 87.Setit
onceforeachprogram.
5. Surround–3dBflagon5.1programsonly:thisparametershouldbesettoDisabled.
6. Downmixparameters:setaccordingtotaste.
•Centerdownmixlevel
• Surrounddownmixlevel
• Preferredstereodownmix
•Lt/RtCenterdownmixlevel
Note: Ensurethattheseparametersaresetcorrectlybecauseotherparametersdependon
them.