Dolby Laboratories DP570 4.6 Monitoring Downmixes, 4.7 Measuring and Setting the Dialogue Level

30 Dolby® DP570 Multichannel Audio Tool User’s Manual
Using the DP570 Features Monitoring Downmixes
4.6 Monitoring Downmixes
TheDP570allowsyoutoauditionvariousdownmixesbeforefinalizingthecontent.
Previewingdownmixconditionsisessentialinprovidingthebestpossibleaudioqualityin
listeningenvironmentswithfewerspeakers.SelectaDownmixmodeandmakenecessary
adjustmentstothemetadataorthesourcemixaccordingly.
Youcansetupseparatesetsofspeakersfordifferentdownmixconditions,sendingastereo
downmixtotheleftandrightspeakersinyour5.1listeningenvironment,thentoa
differentsetofstereospeakersjustbychangingyourspeakerselectionsetting.Itisagood
ideatohavealow‐gradealternatespeakerconfigurationsetuptomonitorthestereoand
monodownmixestomakesureprogramcontentplaysappropriatelyin
“fidelity‐challenged”environments.
Tomonitorthevarious downmixesintheDolbyRemote570application,clickanyofthe
buttonsshowninFigure4‐3,thenadjustsettingsonthemetadatatabsasnecessary.
Figure 4-3 Downmix Options
4.7 Measuring and Setting the Dialogue Level
Thedialoguelevelparameter,alsoknownasdialoguenormalizationordialnorm,isavital
elementinaudiocontentcreation.Theproperdialoguelevelvalueensuresthatthe
consumerhearsdifferentprogramsatthesamelevel.SeeDialogueLevelonpage86fora
detailedexplanationofthedialoguelevelparameter.Thedialoguelevelforeachprogram
mustbecarefullymeasuredandthenappropriatelyset.Thisiseasyusingthecontrolinthe
DialogueLevelSetareaoftheDolbyRemote570,showninFigure 4‐4.
Figure 4-4 Measurement Control Options
4.7.1 Identifying Normal or Average Level Program Segments
Tosetthedialoguelevelparameter,thefirstandmostimportantstepisselectingaudioclip
samplesthatrepresenttheaverageloudnessleveloftheprogramcontent.Rememberthat
thedialoguelevelparameterestablishesthelevelfornormaldialogueintheprogram;
quieterandlouderscenestendtoshowhigherorlowermeasurementsthanthecorrect
value.Usingmorethanoneclipisworthwhileparticularlyinprogramsthatfeature