- Dolby Multichannel Audio Tool User's Manual

52 Dolby
®
DP570 Multichannel Audio Tool User’s Manual
Using the DP570 in Postproduction
7.2 Typical Tasks
TheDP570isusedinthemonitorchaintoemulatetheconsumerʹslisteningenvironment.
7.2.1 Measuring Dialogue Level
Asthemixisnearingcompletion,usethedialoguelevelindicatorsduringarepresentative
periodofspeechtodetermineandselecttheDialogueLevelSetvaluefortheprogram.The
measuredvaluefromprogrammaterialappearsinyellownumbers(–26inFigure 7‐2).The
dialoguelevelvaluesetinthe
softwareappearsingreennumbers(–27inFigure 7‐2).
Figure7‐2 
Figure 7-2 Dialogue Level Controls
Ifitisnecessarytochangethevalueinthesoftware,presstheAcceptbutton.Thesystem
willsettheparameterautomatically.
Inmostcases,selectingandmeasuringarepresentativeperiodofspeechwithinthe
programwillserveasagoodexampleoftheoveralldialoguelevelthroughoutthe
program,provided
goodmixingpracticesareobserved.Insomecases,(documentaries,
locationsound,andsoon),itmaybedifficulttomatchthedialoguelevelfromsectionto
section.Inthesecases,whilethedialoguelevelindicatorsontheDP570canhelp,yourears
arethebesttooltoachievethebestbalance.
Inmostcases,short‐termmeasurementsarebestformonitoringduringeditingasthey
provideameasurementovereach10‐secondperiodofprogramaudioanddonotaverage
themeasurementoveralongperiodoftime.Foralongersectionofprogramthatwillbe
playedbackonce,aninfinite
measurementcanbeusedasitwillintegratethemeasured
valueofthesignaluntilthemeterismanuallyreset,and,overthesinglepass,willreturn
theaverageleveloftheprogram(presumablyspeechcontent)forthatsection.Formore
informationonthemeasurementmodes,seeSection 4.7.2.
For5.1
programming,measuretheCenterchannel,asmostoftheimportant speechcontent
occursinthischannel.Forstereoprograms,measureboththeLeftandRightchannels.
7.2.2 Monitoring the Dialogue Level
Asyouwork,checkthedialoguelevelindicator—theyellownumbersshownin
Figure 7‐2—frequently.
Onceadialoguelevelvaluehasbeenselected,eithershort‐termorinfinitemeasurements
canbeuseddependingonyourpreference.SeeSection 4.7.2formoreinformationonthese
modesandtounderstandthedifferencesbetweenthem.