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Dolby Laboratories DP570 Stereo System User Manual

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Using the DP570 in Master Control Typical Activities

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DP570 Multichannel Audio Tool User’s Manual 59

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—theyellownumbersinFigure 8‐3—ofspeechmatch±2dB.

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ten‐

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Average

LoudnessofIdentifiedClipsonpage 31.

Note:Asingleprogrammusthaveasingledialnormvalue,andthisvalueshouldnot

changewithintheprogram.Adjustaudiolevelstomatchdialnormifnecessary,

ratherthantheotherwayaround.

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