Dolby Laboratories DP570 4.20 Master Trim and Master Volume, 4.21 Dolby Pro Logic II Support

38 Dolby® DP570 Multichannel Audio Tool User’s Manual
Using the DP570 Features
4.20 Master Trim and Master Volume
TheMasterTrimslider,Figure 4‐10,allowsyoutoraiseorlowerthevolume ofthesignal
inputtotheDP570beforeprocessingbegins.Thiscapabilityisveryusefulinlistening
environmentcalibrationprocess.
ThemasterVolu me slider,Figure4‐11,allowsyoutoraiseorlowerthevolu meofallthe
outputssimultaneously.
4.21 Dolby Pro Logic II Support
TheDP570supportsfourProLogicIImodes:Movie,Music,ProLogic,andMatrix.
Panorama,Dimension,andCenterWidthofferavarietyofsettingsactivatedinMusic
mode.
Moviemodeisthestandardsettingforprogramswithvideo.Thisdecodingisbasedonthe
originalProLogicdecodingscheme,butwiththesingleSurroundchannelseparatedinto
LeftSurroundandRightSurroundchannels.
MusicmodeisthemostversatilefeatureofProLogicII.ThesettingsonthePanorama,
Dimension,andCenterWidthmenuscanhelpaconsumermakeastereo(Lo/Ro)
recordingintoonethattakesadvantageofamultichannellisteningenvironment.
Particularlyattractiveforautomotiveentertainmentsystems,thiscanbeusedinhome
theatersaswell.
ProLogicistheProLogicIIsystemreproductionoftheoriginalProLogicdecoding
system.BecauseconsumerdecodersnowofferProLogicIIasthedefaultDolbySurround
decodingsystem,thisemulationmodeisavailabletoreproducetheoriginalProLogic
decodingiftheconsumerwishestohearit.(This optionisnotavailableonallconsumer
decodersmadewithProLogicII.)
Figure4‐13
Figure 4-10
Master Trim Control
Figure4‐14
Figure 4-11
Master Volume Control
Note: Movieistherecommendedmodeforprofessionalmonitoring.Thewiderangeof
possiblechoicesinMusicmodemakeittoocomplexandunpredictableto
emulate.