98 Dolby® DP570 Multichannel Audio Tool User’s Manual
A Guide to Dolby Metadata Parameter Definitions
Audio Production Information
Thisparameterindicateswhetherthemixinglevelandroomtypevaluesarevalid.Ye s
indicatesthatareceiveroramplifiercanusethesevalues.No indicatesthatthesevaluesare
invalid.Inpractice,onlyhighendconsumerequipmentimplementsthesefeatures.
Mixing Level
TheMixingLevelparameterdescribesthepeak��SPLduringthefinalmixingsessionatthe
studiooronthedubbingstage.Theparameterallowsaconsumer’samplifiertosetits
volumecontroltomatchthatofthemixingroom.Thiscontroloperatesinadditiontothe
dialoguelevelcontrol,andisbestthoughtofasthefinalvolumesettingontheconsumer’s
equipment.ThisvaluecanbedeterminedbymeasuringtheSPLofpinknoiseatstudio
referencelevelandthenaddingtheamountofdigitalheadroomabovethatlevel.For
example,if85dBequatestoareferencelevelof–20dBFS;themixinglevelis85+20,or105
dB.
Room Type
TheRoomTypeparameterdescribestheequalizationusedduringthefinalmixingsession
atthestudiooronthedubbingstage.Alargeroomisadubbingstagewiththeindustry
standardXcurveequalization;asmallroomhasflatequalization.Thisparameterallows
anamplifiertobesettothesameequalizationasthatheardinthefinalmixing
environment.
Table D-11 Audio Production Information Settings and Definitions

Audio Production

Information Setting Definition

Yes Mix ing LevelandRoomTypeparametersarevalid.
No MixingLevelandRoomTypeparametersareinvalid
andshouldbeignored.
Table D-12 Mixing Level Setting

Mixing Level Setting

80to111dBin1dBincrements
Table D-13 Room Type Setting

Room Type Setting

NotIndicated
Large
Small