Herearesomepointstobearinmindwhensettingupnon-MeridiansourcesfeedingtheHD621:
• MakesurethattheHDMIsourceisturnedon,andthatitsHDMIoutputisprovidingaudioas
wellasvideo.
• CongurethesourcetooutputPCM.
• Payspecialattentiontothewaythatthesourcehandlesdifferentcontent.Checkthe
congurationtoensurethatmultichannelmaterialisnotdownmixed.
• TheHD621acceptsamaximuminputsamplerateof192kHz.
• Ifpossible,settheoutputsamplerateofyoursourcetomatchthesamplerateofthecontent
beingplayed.Meridianup/downsamplingoffersexceptionallyhighperformanceandyouwill
benetfromallowingtheHD621tocarryoutanyconversionthatisrequired.
Setting up Meridian sources
InthecaseofaMeridiansourcecomponent,youshouldruntheaudiofromtheMHRSmartlink
outputonthesourcetosuitableinputsontheMeridiansystem.
How sources and displays behave
TheHDMIinterconnectionsystemuseshandshakingtoestablishadialoguebetweena
sourceandadisplay.Typicallythedisplaysignalsitscapabilitiestothesource,andthesource
thengeneratesthehighestqualitysignalitcantomeetthosecapabilities.Thisiswhy,when
yourstactivateasystem,theremaybeasuccessionofblankandbluescreenswhilethe
twocomponentsworkouthowtocommunicatewitheachotheratthehighestlevelofquality
commontoboth.
WhentheHD621isaddedtothesystem,itreadsthedisplaycapabilitiesandpassesthem
tothesource,butatthesametimeaddsadescriptionofitsownenhancedaudiocapabilities.
Essentially,theHD621tellsasourcewhataudioitiscapableofhandling(orisconguredto
handle),butitisleftuptothesourcehowitsatisesthosecapabilities.Forexample,ifyou
conguretheHD621for2-channelaudiobutalsospecifythatitcanhandlebitstreams,youwill
needtocongurethesourceastowhetheritshouldsenda2-channelPCMtrackonthediscor
a5.1DTSbitstream,ifbotharepossible.
TheHD621alsohasa“receiver”mode,whichitwillenterautomaticallyifthedisplaydeviceis
switchedoffordisconnected.Thisallowsmusictoplayorcontinuetoplaywithoutadisplay.It
maytakeafewsecondswhiletheunitshandshaketoestablishthismode.Itmayalsotakea
fewsecondstore-establishcommunicationsifthedisplayisre-activated,becauseoftheHDMI
handshakingprocedure.AlsoseeNote1intheOperationalNotessectionattheendofthis
guide.
System defaults
Bydefault,theunitissettoworkwithMeridianprocessorsandDSPLoudspeakers,andto
enhanceupto6-channelPCMinputs.Iftheyhavenotbeendecodedintheplayerorsource
(decodinginthesourceisthepreferredconguration),DolbyDigital,DTSandAACbitstreams
arepassedthroughuntouched.IfyouareusingtheHD621withotherequipmentthatdoesnot
supportMeridian’sMHR,thenyouwillneedtorunMeridianCongtodisableMHR.