user manual

34 Dolby
®
DP570 Multichannel Audio Tool User’s Manual
Using the DP570 Features Setting Dynamic Range Control
3. ThedefaultmeasurementmodeisInfinite.ClicktheInfiniteorShortTermbuttonto
movebackandforthbetweenthemodes.
Thesoftwaredisplaystheleveloftheaudioclip.Thislevelisdisplayeduntilyoustart
anewmeasurementorchangemodes.
4. Repeatthesestepswitheachaudioclipselected.The
DP570shouldreturnsimilar
valuesforeachoftheclips.Ifthevariationbetweentheclipsis4dBorless,selecta
valueforthedialoguelevelparameterwithinthatrangethatbestindicatesthe
averageleveloftheprogramcontent.Atanytime,tousethemeasurementlevel
displayedonthesoftware,clickAccept,andthedialoguelevelparameterissetatthat
level.Tosetthedialoguelevelparametermanually,clickanddragtheDialogueLevel
Setslidertothesettingyouwant.
4.8 Setting Dynamic Range Control
Youcanchoosedynamicrangecontrol(DRC)profilesforRFandLinemodes.Usethe
emulatortomonitorthe effectsofeachprofilesettingontheprogramcontentandsel ectthe
profilethatbestsuitsthematerialineachmode.BothRFandLinemodescanbesettoany
of
thefollowingprofiles:None,FilmStandard,FilmLight,MusicStandard,MusicLight,
andSpeech.Eachprofileisasetofcompressionparameterssuchasratio,attack,and
release.
Fordetailedinformation,seeDynamicRangeControlProfilesonpage 89.
TheCustomadjustmentontheemulatorallowsyoutosimulate
aconsumerdecoderwith
theabilitytovarytheamountofDRCapplied.ThisvariationistotheLinemodeprofile
youhaveselected.Likeallemulatorcontrols,itdoesnotaffectthemetadataorrouter
outputstreams.
Tomodifythedefaultprofileintheremotesoftware,usethedrop‐down
listsandcheck
boxesontheDynamicRangemetadatatab .
4.9 Holding Metadata
TheMetadataHoldbuttonshowninFigure 4‐6allowsyoutorepeattheselectedmetadata
foraslongasyoulike.Whenyoupressit,theDP570“holds”themetadataforthecurrent
frameandrepeatsitineachframeuntilyouclickthebuttonagaintotu rn thefeature off.
Figure 4-6 Metadata Hold Button
Tip:IftheDP570measuresmorethana4dBdifferenceintheaudioclips,reconsiderthe
clipsyouhavechosen,recallingthattheseclipsshouldrepresentnormalspeech
levelinyourcontent.
Tip:Remembertosetthedialoguelevelparameterproperlybeforemakingjudgments
aboutDRC.