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HD621 HDMI Audio Processor
User Guide
Important safety instructions • Readtheinstructions.
• Keeptheseinstructions.
• Followallinstructions.
• Donotusethisapparatusnearwater.
• Cleanonlywithadrycloth.
• Installonlyinaccordancewiththemanufacturer’sinstructions.
• Referallservicingtoapprovedservicepersonnel.
WARNING:TOREDUCETHERISKOFFIREORELECTRICSHOCK,DONOTEXPOSETHISAPPARATUSTORAINORMOISTURE.
ThisapparatushasbeendesignedwithClass1constructionandmustbeconnectedtoamainssocketoutletwithaprotectiveearthingconnection(thethird,groundingpin).
Thisapparatususesasingle-polepowerswitch.AsaresultitisnotisolatedfromACmainspowerwhenswitchedoffattherearpanel.
Theapparatusmaybeisolatedfrommainspowereitherbyunpluggingthepowerconnectorfromtherearoftheunit,orbyunpluggingtheconnectorattheopposingendofthepowercordorcablefromitssupplyoutlet.Asaresult,eitherorbothoftheseconnectorsshouldremainaccessible.
Safety warnings • Donotexposetheproducttodrippingorsplashing.
• Donotplaceanyobjectfilledwithliquid,suchasavase,ontheproduct.
• Donotplacenakedflamesources,suchaslightedcandles,ontheproduct.
To avoid interference
Donotpositiontheproduct:
• Nearstrongmagneticradiation,suchasnearapoweramplifier.
• Neartoatelevision,orwhereconnectingcablesmaybesubjecttoorcauseinterference.
To avoid overheating
Donotpositiontheproduct:
• Indirectsunlight.
• Nearheatsources,suchasaradiator.
Radio interference
FCC Warning:Thisequipmentgeneratesandcanradiateradiofrequencyenergyandifnotinstalledandusedcorrectlyinaccordancewithourinstructionsmaycauseinterferencetoradiocommunicationsorradioandtelevisionreception.Ithasbeentype-testedandcomplieswiththelimitssetoutinSubpartJ,Part15ofFCCrulesforaClassBcomputingdevice.Theselimitsareintendedtoprovidereasonableprotectionagainstsuchinterferenceinhomeinstallations.
EEC:Thisproducthasbeendesignedandtype-testedtocomplywiththelimitssetoutinEN55013andEN55020
Sales and service in the UK
MeridianAudioLtd,LathamRoad,Huntingdon,CambridgeshirePE296YEEnglandTel+44(0)1480445678•Fax+44(0)1480445686
Sales and service in the USAMeridianAmericaInc,8055TroonCircleSuiteC,AustellGA30168-7849,USATel+1(404)3447111•Fax+1(404)3467111
Web: www.meridian-audio.com
Copyright©2009MeridianAudioLtd
DesignedandmanufacturedintheUKbyMeridianAudioLtd.
MeridianAudioreservestherighttomakechangesandimprovementstoanyoftheproductsdescribedinthisdocumentwithoutpriornotice.Errorsandomissionsexcepted.
Dolby,DolbyDigital,andthedouble-DsymbolaretrademarksofDolbyLaboratoriesLicensingCorporation.DTSisaregisteredtrademarkofDigitalTheatreSystemsInc.HDMI,theHDMIlogo,andHigh-DefinitionMultimediaInterfacearetrademarksorregisteredtrademarksofHDMILicensingLLC.Boothroyd|StuartMeridian,Meridian,andMeridianDigitalTheatreareregisteredtrademarksofMeridianAudioLtd.
MHR:ThisproductincorporatespatentedcopyrightprotectiontechnologyandintellectualpropertyofMeridianAudioLtd.ThistechnologyisprovidedfortheexpresspurposeofsecurelycontainingcopyrightaudiowithintheMeridianSystemonly.Reverseengineeringorcircumventionofthisprotectionisstrictlyprohibited.
TheHD621incorporatesHigh-DefinitionMultimediaInterface(HDMI™)technology.HDMI,theHDMILogoandHigh-DefinitionMultimediaInterfacearetrademarksorregisteredtrademarksofHDMILicensingLLC.
HD621 Product highlights• Six-inputHDMIswitch.
• HDMIvideooutput.
• Extractsuptoeightchannelsofhigh-resolutionaudiofromtheHDMIdatastream,supplyingthemtoseparateaudio-onlyoutputs.
• ConnectsHDMIaudiodirecttoaMeridianprocessor.
• SmartLinkcoaxialdigitalaudiooutput(upto8channels).
• MultichannelMeridianHighResolution(MMHR):balanceddigitalaudiooutputviaRJ45/Cat5cable(upto8channels).
• Up/downsamplingofdigitalaudio.
• AudioFIFObufferingandresolutionenhancementimprovesPCMaudioreceivedviaHDMI.
• Lip-synccontrolcompensatesforlatencyresultingfromexternaldigitalvideoprocessing.
• KeepsHDMIvideosignalsawayfromyouraudioequipment,minimisingsignaldegradation.
Outline specificationForm factor
• 1U19inrackmounting.Availablewithorwithoutrackingears.
Power
• Internaluniversalpowersupply,100–250Vac
Connections
• Powerinput(IECconnector)
• DB9MSubRS232serialconnector
• BNCandDINMeridianComms
• SixHDMIinputsockets
• HDMIoutput
• 8-channelMMHRdigitalaudioout(RJ45)
• 8-channelcoaxdigitalaudioout(4xphono)
Front-panel Indicators
• PowerLED
• 6xHDMIInputLEDs(selectedinputlights)
About the HD621 HDMI Audio Processor
Front panel
Thefrontpanel(seeabove)simplyshowsaStandbyLED(whichshowsthattheunithaspowerbutisnotactive:itgoesoutwhentheunitisactivated),plussixLEDsindicatingwhichinputiscurrentlyactive.Amanualselectbuttonallowsyoutostepthroughtheinputs.
Rear panel views. Above: left-hand half. Below: right-hand half.
Rear Panel
Therearpanel(above)featuresthefollowingconnections(LtoR):
RS232DB-9MSubconnector-thisenablestheprocessortobecontrolledremotelyviaserialcommandandconfiguredusingtheMeridianConfigurationApplication(Windows).Italsopermitstheinstallationoffirmwareupdates.
Meridian CommsBNCandDINconnectors–theseenabletheprocessortobeintegratedwithaMeridianaudio/videosystemandcontrolledbyit,forexample,switchingtheHDMIinputwhentheappropriateselectionismadeviathesystemcontroller.
HDMI InputsH1–H6–ThesefollowthestandardinputidentificationinaMeridiansystem(thiscanbeoverriddenwhenthesystemisbeingconfigured):H1 DVDH2 TVH3 CableH4 SatelliteH5 VCR1H6 Game
Standby indicator Manual input select Active input indicators 1–6
HDMI Output: Video–ThisoutputsthevideoinformationpresentontheselectedHDMIinput.Bydefault,itdoesnotcarrytheaudioinformation,butcanbeconfiguredtodoso.
MMHR Output–ThisRJ45connectorcarriesuptoeightchannelsofbalanceddigitalaudiodataatupto96kHzsamplerateconformingtotheMeridianMultichannelHighResolution(MMHR)specification,withencryptionwhererequiredtocarryhigh-resolutionaudiodata.
SmartLink Output–Thesefourphonosocketseachcarryapairofdigitalaudiochannelsignalsatupto96kHzsamplerate:1/2,3/4,5/6and7/8.TheseareencryptedtoMeridianHighResolution(MHR)specificationswhencarryinghighresolutiondata.
Detail of SmartLink output section.
Power inputsocket,powerswitchandfuseholder–thepowersupplyacceptsastandardIECpowerconnectorandisauniversalvoltagetypeacceptingvoltagesbetween100and250VACat50/60Hz.
Up/downsampling of digital audio
TheMMHRandSmartLinkoutputscanbesettodelivereitherstandard(44.1/48kHz)orhighresolution(88.2/96kHz)sampleratedigitalaudio,withresolutionenhancementofupto24-bit.
Whensettostandardrates,theoutputiseither44.1or48kHzirrespectiveoftheinputrate,highsampleratesbeingdownsampledbyafactoroftwoorfourasappropriate.44.1and48kHzratesareunchanged.
Whensettohighrates,theoutputisalwayseither88.2or96kHz,irrespectiveoftheinputrate.StandardsampleratesareupsampledbyafactoroftwousingMeridian’spowerfulDSPtechnology,sothatinputsignalsof44.1and48kHzareoutputat88.2and96kHzrespectively.
FIFO Buffering
Inadditiontothefeaturesnotedabove,theHDMIaudioprocessorde-jittersdigitalaudioreceivedviaHDMIusingtwoFIFO(FirstIn,FirstOut)buffersystems.ThisensuresthattheaudioextractedfromtheHDMIstreamisofthehighestquality.
Lip-sync Delay
Theprocessoralsoincludesaconfigurableaudiodelayofupto85mstoallowlip-syncingintheeventthatthedisplayintroducesanappreciabledelayinthevideopresentation.
Initial system installationUsingthedefaultfactorysettings,theHD621isoptimisedforaMeridiansystemenvironment.ItallowsuptosixHDMIsourcestoconnecttoaMeridiansystemwhilesupplyingHDMIvideo(andoptionallyaudio)toadisplay.
Whileinstallingtheunit,pleasebesuretofollowthesafetyinstructionsprovidedatthefrontofthisGuide.
TheHD621cansimplybeplacedonaflatsurface;aversionwithearsisalternativelyavailableforrack-mountinstallation.
Initial connectionsUsingtheBNCorDINconnectorprovided,connectMeridianCommstotheunitfromtherestofyoursystem.
ConnectanHDMIsourcetoeachoftheinputsyouwishtouse.YouwillseethattheconnectorsarenamedaccordingtothestandardconventionadoptedbyMeridianequipment.Ifyouconnectyoursourcesassuggestedbythelabels,youwillnotneedtochangethemintheMeridianConfigurationapplication.
IfyouhaveMeridiansourcecomponents,connecttheiraudiodirectintotherestofthesystemusingSmartLink:seeoverleaf.Fornon-Meridiansources,seebelow.
ConnectanHDMIcablebetweentheHDMIOutputoftheHD621andaninputonyourdisplaysystem.
ConnecttheSmartlinkMHR(MeridianHighResolution)outputtoasuitabledigitalinputonyourMeridianprocessororDSPLoudspeakers.Besuretoobservethechannelallocationcorrectly.Eachsocketcarriestwochannelsandyoushouldconnecttheappropriatenumberofsocketsforthemaximumnumberofaudiochannelstobeused.
IfyouhaveaMeridianprocessorwithMMHR(MeridianMultichannelHighResolution)capability,connecttheHD621totheprocessorwithasingleCat5orCat6ScreenedTwistedPair(STP)RJ45-terminatedcable.Donotconnectthephonosockets.
Connectpower(100–240VAC)totheunitviatheIECmainsconnector.
Setting up non-Meridian sourcesNon-MeridiansourcessendingaudioviaHDMIshouldinmostcasesbeconfiguredtodecodetheaudiotoPCMinthesourcecomponenttotakeadvantageoftheresolutionenhancementfeaturesoftheHD621.
ForbestresultsyouneedtoconfigureyoursourcecomponentstogetthehighestpossiblequalityaudiofromyourHD621.TheHD621containssophisticatedDSP-basedFIFObuffering,reclockingandup/down-sampling,sobestresultswillbeobtainedbyconfiguringyoursourcessothattheHD621carriesouttheseprocesseswhenrequired,andnotthesource.
Herearesomepointstobearinmindwhensettingupnon-MeridiansourcesfeedingtheHD621:
• MakesurethattheHDMIsourceisturnedon,andthatitsHDMIoutputisprovidingaudioaswellasvideo.
• ConfigurethesourcetooutputPCM.
• Payspecialattentiontothewaythatthesourcehandlesdifferentcontent.Checktheconfigurationtoensurethatmultichannelmaterialisnotdownmixed.
• TheHD621acceptsamaximuminputsamplerateof192kHz.
• Ifpossible,settheoutputsamplerateofyoursourcetomatchthesamplerateofthecontentbeingplayed.Meridianup/downsamplingoffersexceptionallyhighperformanceandyouwillbenefitfromallowingtheHD621tocarryoutanyconversionthatisrequired.
Setting up Meridian sourcesInthecaseofaMeridiansourcecomponent,youshouldruntheaudiofromtheMHRSmartlinkoutputonthesourcetosuitableinputsontheMeridiansystem.
How sources and displays behaveTheHDMIinterconnectionsystemuseshandshakingtoestablishadialoguebetweenasourceandadisplay.Typicallythedisplaysignalsitscapabilitiestothesource,andthesourcethengeneratesthehighestqualitysignalitcantomeetthosecapabilities.Thisiswhy,whenyoufirstactivateasystem,theremaybeasuccessionofblankandbluescreenswhilethetwocomponentsworkouthowtocommunicatewitheachotheratthehighestlevelofqualitycommontoboth.
WhentheHD621isaddedtothesystem,itreadsthedisplaycapabilitiesandpassesthemtothesource,butatthesametimeaddsadescriptionofitsownenhancedaudiocapabilities.Essentially,theHD621tellsasourcewhataudioitiscapableofhandling(orisconfiguredtohandle),butitisleftuptothesourcehowitsatisfiesthosecapabilities.Forexample,ifyouconfiguretheHD621for2-channelaudiobutalsospecifythatitcanhandlebitstreams,youwillneedtoconfigurethesourceastowhetheritshouldsenda2-channelPCMtrackonthediscora5.1DTSbitstream,ifbotharepossible.
TheHD621alsohasa“receiver”mode,whichitwillenterautomaticallyifthedisplaydeviceisswitchedoffordisconnected.Thisallowsmusictoplayorcontinuetoplaywithoutadisplay.Itmaytakeafewsecondswhiletheunitshandshaketoestablishthismode.Itmayalsotakeafewsecondstore-establishcommunicationsifthedisplayisre-activated,becauseoftheHDMIhandshakingprocedure.AlsoseeNote1intheOperationalNotessectionattheendofthisguide.
System defaultsBydefault,theunitissettoworkwithMeridianprocessorsandDSPLoudspeakers,andtoenhanceupto6-channelPCMinputs.Iftheyhavenotbeendecodedintheplayerorsource(decodinginthesourceisthepreferredconfiguration),DolbyDigital,DTSandAACbitstreamsarepassedthroughuntouched.IfyouareusingtheHD621withotherequipmentthatdoesnotsupportMeridian’sMHR,thenyouwillneedtorunMeridianConfigtodisableMHR.
ToreconfiguretheHD621fromitsstandarddefaults,youwillneedtoconnectaWindowscomputerviatheRS232connectorandusetheMeridianMconfigapplicationtosetitup.Seebelowfordetails.
Controlling the HD621
TheHD621canbecontrolledviaMeridianComms,fromthefrontpanelandviaRS232serialcommands.
Thefrontpanelallowsyoutostepthroughtheactiveinputs.Aninputthathasbeendisabledwillnotbeincludedasyoustepthrough.Nootherfunctionsareaccessiblefromthefrontpanel.
RS232canbeusedtocontroltheHD621inconjunctionwithahomeautomationsystem.TheunitrespondstostandardMeridiancommandstoselectnamedsources,enterStandbyandotherfunctions.AnRS232commandtableisavailableonrequest.
Setting up the HD621 with Meridian’s Configuration ApplicationMeridian’sConfigurationApplicationisaWindowsapplicationthatisusedtosetupMeridiancomponentsandsystems,andissuppliedontheCDthataccompaniesmanyMeridianproducts.Fordetailsonhowtouseit,seeitsbuilt-inHelpfiles.YoucanalsodownloaditsUserGuidefromtheSupportsectionoftheMeridianWebSiteathttp://www.meridian-audio.com.MovethemouseovertheSupportoptioninthemainmenuandselect“ReleasenotesandGuides”,thenclickthelinktodownloadtheAcrobatPDFfile.TheConfigurationApplicationisinstalledbytheCommonInstallerwhichcanalsobedownloadedfromtheSupportsectionofthewebsite(choose“DownloadInstaller”fromtheSupportmenu).Web addresses may change over time. Contact Meridian if you cannot locate the information described.
ConnectionsConnectyourcomputertotheHD621viaRS232andruntheMeridianConfigurationApplication.
TheHD621issetupinthesamewayasanyotherMeridiancomponent.
• Note:theHD621canactasaController.Howeveryouwillonlyuseitassuchinanon-Meridiansystem.IfyouselecttheHD621asthecontrollerinaMeridiansystem,theavailableinputsonaMeridianprocessoryouaddsubsequentlywillbelimitedtothosedefinedfortheHD621.
ToconfigurethecapabilitiesoftheHD621,bringupthePropertiesdialogfortheproduct.
TheAudiotabisusedtodefinetheaudiobehaviouroftheHD621(seeillustrationoverleaf).
Thefirstrow,AudioOutput,selectstheoutputportusedtointerfacewiththesystem,usingthepop-upmenuinthe“Value”column.Thiswilleitherbe“SmartLink/MMHR”(normally,tousethephonoorRJ45outputs)or,exceptionally,“VideoHDMI”,whichretainstheaudioonthetheHDMIoutputalongwiththevideo.AllthefollowingrowsdescribetotheHD621thecapabilitiesoftheproduct(s)itisfeeding.
Thesecondrow,“MHRConnection”offers“SmartLink”,“SpeakerLinkcompatible”and“None”.Select“SmartLink”tofeedaMeridianprocessorsuchastheC61R,G61R,G68or861,andselect“None”heretofeedMeridianDSPLoudspeakersdirectly.
Thenextrowdeterminesthenumberofoutputchannels.Theoptionsare8-,6-and2-channelout.Thiswillgenerallybedeterminedbythecapabilitiesofyoursystem.NotethattheHD621advertiseshowmanychannelsitwantstoreceive.Forexample,inthecasethat6arechosenhereand8areavailablefromthesource,thentheHD621willinstructtheplayertooutputthe6-channelversion.
YouonlyneedtomakephysicalconnectionsbetweentheHD621andthesystemthatcorrespondtothenumberofchannelsselectedhere.So,forexample,ifyouhavea2-channelsystemandlimitthePCMoutputhereto2-channel,youonlyneedtoconnectthe“1/2”SmartLinkoutputfromtheHD621tothesystem.
ThenextthreerowsinformthesourceaboutthedecodingcapabilityoftheproductsfedbytheHD621.SelectallthreeforMeridianprocessorssuchastheC61R,G61RandG68,leave“AAC”uncheckedforthe861,andleaveallthreeuncheckedifyouaredrivingMeridianDSPLoudspeakersdirectfromtheHD621.
The“OutputRate”rowdeterminesthecapabilityoftheproductfedbytheHD621andwhethertheunitoutputshighsamplerates(88.2or96kHz)orstandardrates(44.1or48kHz).Checktheboxtosetthisto“Yes”:inthiscasetheunitwillalwaysoutputhighsamplerates,byupsamplingstandardsampleratesordownsamplingsuper-highsamplerates(176.4or192kHz).Ifsetto“No”,alloutputsareatstandardrates,withhigher-ratesourcesdownsampledaccordingly.Setto“No”forearlyDSPloudspeakers,D600sandthe561.
ThefinalrowdetermineswhetherMHRisactiveornot.CheckingtheboxallowstheHD621toprotectcopyrightedaudioortoenhancethequalityofothers.
NexttotheAudiotabistheSourcestab:
Thispaneldisplaysthelogicalsourcesassociatedwitheachphysicalinputandallowsthemtobeassigned.Eachphysicalsourceshowsasanicon–inthisexamplethereisonlyone,theBDplayer,sothereisonlyoneicon.Howeveryoucanassignmorethanone“logical”sourcetoaphysicalinput.
ThepenultimatetabinthePropertiesdialogaccessestheTypessection.ThisshowstheMeridianTypesstoredintheproduct.YoucanresettheHD621toaTypebyselectingthedesiredTypefromthelistandright-clickingonit,thenchoosing“ResettothisType”fromtheresultingpop-upmenu.
Thefinaltabis“Connections”.Thisdisplaystheinputsandoutputsavailableonthedeviceandwhattheyareconnectedto.Youcanfiltertheresultsshownherebyright-clickingonanitem(anyitem)inthelistandcheckingtheitemsyouwanttodisplay,oruncheckingthemtohidethem.
Complete the configuration process by Storing the settings to the HD621.Finally,clicktheClosebuttontofinishworkingwiththeHD621Propertiesandcontinuetosetupthesystemasrequired.
Operational Notes1.Somesource/displaycombinationsmaynotreturncleanlyfrom“receiver”mode,duetothewayinwhichtheyhandlehandshaking.Ifyoudonotgettheexpectedresult(egnoaudioisheard)evenafterseveralsecondshaveelapsed,itmayhelptoswitchtoanotherinputandthenbackagain.ThisisnotafaultintheHD621:itisafunctionofhowthesourceanddisplaycommunicatewitheachother.
2.Handshakingbetweenadisplayandasourcecantakesometimeandyoumay,forexample,seeaseriesofalternatingblankandbluescreens.Thisisnotafault.
HD621UG-ENG•Partno:P88380•Version1.320090601•REƒ
Meridian Audio Limited,LathamRoad,Huntingdon,CambridgeshirePE296YE,UK.T+44(0)1480445678F+44(0)[email protected]
Meridian America Inc., 8055TroonCircle,SuiteC,Austell,GA30168-7849,USA.T+1(404)3447111F+1(404)3467111
www.meridian-audio.com