Dolby Laboratories DP570 8.2.2 Monitoring Dialogue Level

Typic al Ta sks
Dolby® DP570 Multichannel Audio Tool User’s Manual 57
Figure8‐3
Figure 8-2 Typical Downmix Options
Or,ifaviewercomplainsabouttheaudioqualityonamonotelevisionwhenviewinga5.1
program,theMCoperatorcanquicklyselectMonointheDownmixsection,andRFto
emulatetheviewerʹslisteningconditions.
8.2.2 Monitoring Dialogue Level
Whenchangingprogramsorchannels,refertothedialoguelevelindicatorstoverifythat
thedialoguelevelvaluesetinthesoftware—thegreennumbersinFigure 8‐3—andthe
measuredvalueofspeech—theyellownumbersinFigure 8‐3—match±2dB.
Figure8‐4‐
Figure 8-3 Dialogue Level Controls
Ifthedialoguelevelvaluedoesn’tmatch,werecommendadjustingtheoverallaudiolevel
untilitdoes.
Inmostcasesshort‐termmeasurementsarebestastheyprovideameasurementovera10‐
secondperiodofprogramaudioanddonotaveragethemeasurementoveralongperiod
oftime.Formoreinformationonthemeasurementmodes,seeMeasuringtheAverag e
LoudnessofIdentifiedClipsonpage28.
Note: Asingleprogrammusthaveasingledialoguelevelvalue,andthisvalueshouldnot
changewithintheprogram.Adjustaudiolevelstomatchthedialoguelevelif
necessary,ratherthantheotherwayaround.