- Dolby Multichannel Audio Tool User's Manual

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Volumeslider,Figure 4‐11,allowsyoutoraiseorlowerthevolume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sett ings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.