mu1 software manual, to be read next to the hardware manual - grimm audio · 2020. 11. 4. · audio...

MU1SoftwareManual,tobereadnexttotheHardwareManualPleasereadthismanualbeforeopera3ngtheunit!

Forfirmwareversionv1.2.14

TableofContents1Introduc7on.......................................................................................................................................32Setup..................................................................................................................................................43RoonLabssetup.................................................................................................................................94Control.............................................................................................................................................17

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1 Introduc3on

ThankyouforpurchasingtheGrimmAudioMU1mediaplayer.Itisdesignedtobethemostsophis7catedandbestsoundingmusicplayeronthemarketandatthesame7meblendseamlessinyourdailymusicplayingrou7ne.CoreoftheMU1technologyisanFPGAprocessorboardofourowndesignthatoffersthehighestqualityoversamplingandde-jiQeringpossible.Theamountofworkandknowledgethatwentintothisprojectcanhardlybeoveres7mated.Allthiseffortresultedinanelegantboxofminimalis7cdesignthathumblystepsoutofthewayforthemusic.Wearegratefulthatwewereallowedtodevelopthisgemandwishyoumanypleasurablehoursoflistening.

Inthismanualyouwillfindallinforma7onrelatedtothesoTwareofyourMU1.SincethissoTwareisregularlyupdated,wedecidedtoofferthisMU1soTwaremanualonlyasdownload.YourMU1wasshippedwithaprintedMU1hardwaremanual.Pleasereaditcarefullyforyourownsafety.YoucanalsodownloadapdfoftheMU1hardwaremanualontheMU1pageofourwebsitegrimmaudio.com.

[email protected]

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2 Setup

Interfacedescrip3on

Front:

OntheleTyoufindtheMU1ac7vityLEDinthe‘i’oftheGrimmlogo.Thedisplayshowsalluserinforma7on.

TheMU1ac7vityledshowsthecurrentac7vityoftheMU1system.Table1belowshowsthemodi.

Off MU1isofforisupda7ng.1

On MU1isonorboo7ng2

Fadingslowly MU1isinstand-bymode.

Table11Thesystemwillonlyupdatewhentheuserhasmanuallyac7vatedtheupdate.Seechapter“Control”.2Whenthesystemisboo7ngupthedisplaywillshowananima7on.

Thedisplayshowsinforma7onaboutthesystemdependingonitsstate:

• Systemoff:displayisblack,noinforma7on.• Systeminstand-by:displayisblack,noinforma7on.• Systemisboo7ngup:bootanima7onisrunning,aTerboo7ngthewelcomepictureis

shownun7lthesoTwareisready.• Systemon:thisstatehasdifferentmenuswhereinforma7oncanbeshownandse`ngscan

beadjusted.Thesese`ngsaredescribedinthechapter“Control”.• Systemshu`ngdown:displayisshowingshutdownanima7on,withdimmedbacklight.It

goestoblackwhensystemisfullyshutdown.

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Rear:

Ontherearofthesystemvariouscableconnec7onsandthemainpowerswitchcanbefound.FromrighttoleT:themainspowerconnector,asmallmainspowerswitch,a3.5mmsocketforanexternalIRremotesensor,anethernetnetworkinput,2USBconnec7onsforexternalstorage,anFMcableinput,threedigitalaudioinputs,threedigitalaudiooutputs(twogenericAES3andoneGrimmLS1).Inthefollowingsec7ontheseconnec7onsaredescribedinmoredetail.

1.Themainspowersocket(standardIEC60320model).IncaseyourcountryhasanEU,USorUKtypewalloutlet,yourMU1wasshippedwiththecorrespondingpowercord.Otherwise,pleaseconsultyourdealer.

2.Themainspowerswitch.Thisisasmallrecessedswitch.Ifthesystemisoffandthepowercordisconnected,presstheswitchonceusingyourfingernailtobootthesystem.Ifthesystemison,presstheswitchoncetoshutdownthesystem.

Hint:ThepowerswitchdoesnotrespondwhiletheMU1isupda3ng.

3.Minijackinputforinfraredremotesensor.[Tobeimplemented]

4.Ethernetinput.ConnectyourwiredlocalnetworktotheMU1usingthisRJ45connector.ThecabletypeshouldbeatleastCAT5etoensurethatlossofnetworkdatapacketsisminimized.Pleaseusehighqualitycablesintendedforusewithcomputersystemsandavoidcableswithclaimedspecialquali7esforaudio.

5.DualUSBinput.ThesetwogeneralpurposeUSB3.0connectorsmaybeusedforconnec7nganexternalUSBdrive(flashdrive,SSDorHDD)forextendingthediskspaceoftheMU1system.Youmayplaymusicfilesfromthisdrive.TheMU1supportsthefollowingfilesystems:FAT32,NTFS,HFS+,exFAT,EXT2andEXT4.WhenaUSBdeviceispluggedin,itwillbeautoma7callymountedinthesystem.SinceUSBdrivesaremountedin‘readonlymode’,itisnotnecessaryto‘safelyremove’theUSBdevicefromthesystem,thedeviceisunmountedautoma7cally.

ThemountedfoldercanbefoundthroughtheRoonstoragese`ngs.GototheRoonSeBngs→StorageandpressthebuQon“+AddFolder”.

TheUSBdiskshouldappearinthemenuontheleT.Thenamewillconsistofthenameoftheusbdiskwiththepreface“usbdisk-”.Ifyoudon’tseeithere,gototherootdirectory“/”andopen“mnt”.Hereyouwillfind“usbdisk-name”.Selectthisfoldertoaddit.

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6.AnalogFMinput.[Tobeimplemented]

7.Digitalaudioinputs.TheMU1hasthreedigitalinputsontheback.Thesesourcescanbeselectedwiththemaincontroldial.Readchapter“Control”forinstruc7onsabouthowtodothis.TheselectedsourceisroutedviatheFPGAforoversamplingandde-jiQeringandbenefitsfromMU1’shighperformancerendering.

a)S/PDIFdigitalinput:orangeRCAconnector,digitalinputforS/PDIFsources.

b)Op7caldigitalinput:blackToslinkconnector,digitalinputforS/PDIFsources.

c)AES3digitalinput:XLRconnector,digitalinputforAES3sources.

8.Digitalaudiooutputs.Therearethreedigitaloutputs.Thesecanbeconfiguredasstereooutputsthatcarrythesameaudiodataorassixindividualoutputsforsurroundplayback(tobeimplemented).FromrighttoleT:

a)LS1output:aproprietaryconnec7ontotheLS1playbacksystem,carryingbothaudiodataandcontroldata.Thecableforthisconnec7onissuppliedwiththeLS1system.Connectthiscabletothe“Controlin”inputoftheLS1.

Warning:Donotconnectanetworkcabletothisconnec3on!AlthoughanormalRJ45connectorfits,thisoutputmayonlybeusedforLS1controlconnec3on.GrimmAudioisnotliablefordamagetoalocalnetworksystemasaresultofincorrectwiringbytheuser.

b)Digitaloutput1:transformerbalancedXLR3digitaloutputforuseinasurroundLS1systemorconnec7ontoathird-partyDAC.

c)Digitaloutput2:transformerbalancedXLR3digitaloutputforuseinasurroundLS1systemorconnec7ontoathird-partyDAC.

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Top:

ThetopoftheMU1carriesthemaincontrolknob.ItisusedforalluserinputoftheMU1viaturningandpressing.Dependingonthestateofthesystemandthemenuselec7onthisknobchangesfunc7onality.

ThesystemwillboottotheMusicView.Theuseofthemaincontrolinthisstateis:

• Volumeup(turnright)

• Volumedown(turnleT)

• Pause/mute(shortpress)

• Entermenu(longpress)

• Pressandturnselectstheinput.

Ashortpressisshorterthan2seconds,alongpressislongerthan2seconds.Howtoenterandleavemenusisdescribedinthe“Control”chapter.

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3 RoonLabssetupGrimmAudioselectedRoonLabsfortheuserinterfaceandaudioengineforfileandstreamplaybackontheMU1(analterna7veUIandenginewillbeaddedlater).InouropinionRoonoffersthebestHigh-Enduserexperiencetodate,arealmusthave.BothRoonCoreandRoonEndPointarepre-installed,sonoothercomputerisneeded.PleasemarkthatRoonLabsisapaidsubscrip7onsoyouneedtoenteryouraccountdetailsviatheRoonapp.RoonLabsupportsTidalandQobuzlosslessmusicstreamingservices.Theseareseparatelypaidsubscrip7ons.YouneedtoenteryouraccountdetailsoftheseservicesviatheRooninterface.

Opera7ngtheRoonsystemintheMU1isiden7caltothatofanyotherRoonequippedsystem.FirstyouneedtoinstalltheRoonremotecontrolsoTwareforatablet,smartphone,PCorMactogetaccesstotheRoonCoreserverintheMU1.PleasevisittheappstoreofyourOSmanufacturer,orusethislink:hQps://roonlabs.com/downloads.html.Forgeneralopera7onalguidelinesoftheuserinterface,wereferyoutotheRoonLabsdocumenta7on:hQps://roonlabs.com/support.html.TheMU1canperformallprocessesthatRoonoffers,butwerecommendtousetheMU1FPGAoversamplinganddownsamplingalgorithmsinsteadoftheRoonofferings,anduseRoonjustforaudioplayback.Roonisacapablemul7roomsystem.IfyoulikeyoucanusetheRoonCoreintheMU1tostreammusictootherRoonEndpointsinyournetwork(forinstanceasysteminthekitchen).Pleasenotethattheoversamplingandde-jiQeringquali7esoftheFPGAintheMU1canonlybeenjoyedwiththedigitalaudiooutputsontheMU1.

TheMU1canplayallfileformatsthatRoonsupports,suchaswavandflac,andhasna7vesupportofPCMformatsupto8xthebaserate(8FSor“DXD”)andofDSDformatsuptoDSD256.TheFPGAprocessorintheMU1canupsample1FSand2FSsourcesto4FSanddownsample8FSandDSDformatsto4FS.

Enablingtrackinforma3onontheMU1display

ToshowthesongthatcurrentlyplaysontheMU1display,youneedtoenabletheMU1soTwaretocommunicatewiththeRoonLabssoTware.Thisisfacilitatedbya‘RoonExtension’.SinceRoonExtensionscanonlybeenabledbytheaccountowneroftheRoonsoTware,youneedtoperformthisstepyourself.Pleaseconnectatablet,smartphone,PCorMactothesamenetworkastheMU1andinstallthe‘Roon’(not‘RoonServer’)remotecontrolsoTware:hQps://roonlabs.com/downloads.html.Next,pleasefollowthefollowingsteps:

• SwitchontheMU1forthefirst7me.

• StartRoononthetabletorPC/MacsoTware,waitun7ltheMU1popsupasadeviceandselectit.

• LoginwithyourRoonaccount.

• Gotothese`ngsmenuandselectthetab‘Extensions’.

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• AddtheGrimmAudioextensiontoyourMU1byclickingtheEnablebuQoninthemenu.Theextensionwillcontainapartoftheserialnumberasshownintheimagebelow.

VolumecontroloftheLS1DSPandtheFPGAvolumecontrolofselecteddigitaloutputsshouldnowworkviaboththeRoonappandtheMU1maincontrol.Addi7onallyyouwillseeinforma7onaboutthecurrentlyplayingtrackinthedisplayandaprogressbaroftherunningtrack.

VolumeseWngs

Weputinasafetylimitonthevolumecontrol.WheneveryouturntheMU1maincontrolortheRoonappvolumefaderquicklytothemaximumposi7on,thevolumewilljumpbacktothelowestlevel(thefaderwillstayatthemaxposi7onthough).Thiswillprotectyourequipmentwhenthecontrolsaresettomaxbyaccident.Ifthishappenstoyou,becarefultopausethemusicfirstbeforetouchingthefader,sinceitcans7llbecomeloudwhentouchingthefader.

Asanalterna7ve,werecommendtosetacomfortlimitfortheRoonfaderinthedevicesetupsoyoucannotaccidentallysetthevolumeveryloudbyslidingthevolumebartoofartotheright.Incaseyoudoliketoplaylouderthanthelimit,youcans7llpressthe+or–buQonsintheRooninterfacetoincreaseordecreasethevolumeoftheLS1playbacksystem.Tosetthecomfortlimit,pleasebrowsetotheAudiotaboftheRoonse`ngs,tapthe‘cog-wheel’configura7onlogoontherightoftheGAMU1deviceandselect‘DeviceSetup’,asshowninthepicturebelow.

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Hereyouselect“Setvolumelimits”andsetitto‘64’whichcorrespondstoanacceptablecomfortlevelformostmusic.IfyourtastemainlycoverssoTlyrecordedtracks,youmaydecidetosetahigherlevel.

Warning!IntheDevicesetupmenuyoucanalsochangethevolumeseWngstypeofRoon.Youshouldalwayskeepthe“VolumeControl”setto“Devicevolume”.Switchingto“DSPVolume”or“FixedVolume”willgiveproblemswithvolumecontrol,thatcanjumptomaximum(weaddedasafetybrakeforthat,buts7ll).Ifyouaccidentallychangedthese`ngsyoucangetoutofthisstatebypressingthe“LoadDefaults”buQonin‘DeviceSetup’.Thiswillrestorethesystemtothenormalstate.Moreinforma7oncanbefoundhere:hQps://kb.roonlabs.com/Audio_Setup_BasicsinchapterVolumeControlMode.Thispagestatesaboutthevolumese`ngs:“It'stheretosolveproblems-ifyoudon'thaveproblems,youdon'tneedit!”

DSDplaybackseWng

WhileyouareintheDeviceSetuppage,pleasesetthe“DSDplaybackstrategy”to“Na7ve”ifitisnotalready.TheMU1FPGAprocessorhasasuperiorqualityDSDdownsamplerandwerecommendtousethisfeaturetoplayDSDfilestotheLS1systemorotherPCMDAC’s.Youmayalsoopenthe“advanced”partofthiswindowandcheckwhetherthemaxsamplerate(DSD)issetto“uptoDSD256”andthemaxsamplerate(PCM)issetto“upto384kHz”.

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Backgroundanalysisspeed

IntheLibrarypageoftheSe`ngsmenuRoonoffersseveralop7onsforthe‘BackgroundAudioAnalysisSpeed’.Werecommendtosetthisto“ThroQled”andnottooneofthe“Fast”op7ons.ThismakessuremostoftheprocessingpoweroftheCPUisdedicatedtoaudioplayback.Youmayalsosetitto“Off”,Roonwillthencalculatethewaveformofanewfileontheflywhenitisplayed.

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UpdatesofRoonso]ware

RoonLabsoffersfrequentupdatestoboththeRoonCoreappintheMU1andtheRoonRemoteappinyourtabletorsmartphone.Updatesonyourphone/tabletareusuallyinstalledautoma7cally.IfaRoonCoreupdateisavailabletheRoonRemoteappwillinformyouaboutthat.YouarepermiQedtostartaRoonCoreupdateprocessintheMU1fromtheRoonRemotephone/tabletapp,butwearenotliablefortheimpactofproblemsthatmayoccur.Ofcoursewewillinthatcaseoffersupporttohelpyousolvetheproblem,wherepossible.

KnownissueswithRoonontheMU1

#1Hamperedplaybackwhenanalysingalargecatalog.

Whenyouaddafolderwithlotsofalbums,Roonwillanalysethefiles,downloadartworketc.Itwillalsodoananalysisoftheaudiodatatostorewaveformsthatareshownintheuserinterfaceandtostoretheaverageloudnessofthetrackforloudnessnormaliza7onuse.Duringtheini7alsetup,Roon’slaborcancausethesystemtobelessresponsive.Althoughitshouldbepossible,werecommendtonotusethesystemformusicplaybackwhileRoonrunsthisanalysisforthefirst7meonalargesetofalbums.Ifyouletitrunovernight,itisusuallyfinishedthenextday.

Whenyouaddafewalbumsonly,playbackisnothamperedandthiswillnotaffecttheplayback.Neverthelesswerecommendtousethe“ThroQled”modefortheanalysistokeeptheCPUloadlow.ThiscanbeselectedintheRoonse`ngs,seechapter“Backgroundanalysisspeed”.ConsulttheRoonmanualformoreinforma7on.

#2SoTglitchesinDSDalbumplayback.

PleasemarkthatwhenplayingalbumsinDSDformat,theendandstartofthefilesarenotreproduced100%gaplessbydesign,whichmeansthatasoTglitchcanbeheardatthestartofanewtrack.ThisglitchisinthemasterfilesandcannotbesolvedintheMU1orRoonsoTware.Also,ashortmomentaTerplaybackofaDSDfilehasstopped,Roonwillswitchtoa‘silent’PCMstreamandthisalsocausesasoTglitch.

#3AddingtherootsystemfoldertoRoon.

Whenaddingtherootdirectoryor“/”inthestoragese`ngsofRoon,problemsmayoccur.RoontriestoindextheOSfilesystemmakingitslowandinsomecasesmightevenmakeRooncrash.Insteadofaddingtherootdirectory,pleaseaddthepropermusicfoldersasexplainedinthenextchapter.

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Internaldisk

TheMU1op7onallyhasaninternaldiskformusicfiles.Addingmusictothefoldersofthisdriveisdoneviathenetwork,howtodothisisdescribedbelowforWindowsandMac-OS.

Firstofall,openthehelppageoftheMU1menu(seechapter“Control”)andnotethehostnameandIP-address.

Windowsusers:

Note:NotallWindowscomputerscanusethehostnameforfindinganinternaldiskinthenetwork.Thisisbecause“mDNS”isnotna3velysupportedbyWindows.However,onmanyWindowscomputerssoUwarehasbeeninstalledthataddedsupportforthisprotocolandthereforeweadvicetofirsttrytousethehostnameandifthisdoesn’twork,usetheIPaddress.

1. OpentheFileExplorer(thisisdonebyopeningarandomfolder).

2. Enter‘\\“hostname”’intheaddressbarasshownintheimagebelow.

Note:Ifyoudonothave“mDNS”thisdoesn’twork.Usetheip-address:‘\\“ip-address”’

3. TheinternaldiskisnowshownintheFileExplorer.Youcannowadd,deleteandmovemusictotheMU1internaldiskfromyourWindowscomputer.

Tip:Makeashortcuttothisfoldersoyoucaneasilyfinditinsteadoftypinginthehostname.

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Macusers:

ThesharedfoldercanbefoundintheFinder,intheleThandcolumnunder“Shared”.

ATerselec7ngthisfolder,youcanadd,deleteandmovemusicherefromyourMac.Pleasemindto‘eject’themountedfolderbeforedisconnec7ngfromthenetwork(forinstancewithalaptop).

IftheMU1doesnotshowupintheSharedsec7on,press⌘-KtoopentheConnecttoServerwindow.EnterthehostnameandpressConnect.ThehostnameofyourMU1isindicatedonthesecondpageoftheMU1menu,seeMenuViewinchapter7ofthismanual.Connectas“guest”totheMusicsharefolder.Intheunlikelyeventthatconnec7ngtothehostnamedoesnotwork,pleaseentertheIPaddressofyourMU1,whichisfoundonthesamemenupageoftheMU1.

Note:Ontheinternaldiskyouwillfindadirectorylost+found,youcanignoreordeletethisfolder.

Tip:AUermoun3ngyoucanmakeabackupofthemusicthatisstoredontheMU1internaldriveviayourWindowsorMaccomputerbyusingyourfavouritebackupapplica3on.

HowtoaddtheinternaldisktoRoonToaddtheinternaldisktotheRooncatalog,firstremoveanymemorys7ckorUSBdrivethatyouconnectedtoaUSBreceptoronthebackoftheMU1.NextopentheStoragese`ngsinRoonandclickon“Addfolder”.TheinternaldiskshouldshowupinthemenuontheleTas“HEAP”.SelectthisfoldertoaddthedisktoRoonasmusicfolder.

IfthediskdoesnotappearasHEAPyoumustadditmanually.PleasenotethattheprocedureforthisisdependentontheserialnumberofyourMU1.Forserialnumbersstar7ngwith13.0.001.xxxthelabelissda1.Forserialnumbersstar7ngwith13.0.002.xxxthelabelissdb1.

Clickon“Addfolder”andgototherootdirectory“/”,open“mnt”andchoose“sdx1”(thenameoftheinternalSSDdrive,dependingontheserialnumber).Yourmusicfoldersareonsda1orsdb1andwillnowbeadded.

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Tip:Roonwillautoma3callyappendmusicthatyoulateraddtoyourmusicfolder.

SelecttheHEAPdriveifitisavailable.

Selectsda1orsdb1(dependingonserialnumber,seeabove)in“/mnt/”iftheHEAPdriveisnotavailable.

RoondatabaseaccessIncaseyouencounteraproblemwiththeRoonsoTwareandconsultwithRoonSupport,theymayaskyoutoview,copy,renameorresetyourRoondatabase.Thedatabasefoldercontainsallse`ngs,logfilesanddatabaseitems.TheMU1mountsthisfolderinthenetworkunderthesharename“roondata”,anditispasswordprotectedtopreventaccidentallyrese`ngthedatabase.Thecreden7alsareasfollows:Username:mu1-user;Password:mu1-pass.HowtomountthisinternaldiskinyourPCorMacisexplainedinthechapterInternaldiskabove.

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4 ControlThischapterdescribestheusermenusandse`ngsoftheMU1.

MusicView

Func7onofthemaincontrolknob:

• TurnleTforloweringvolume.

• Turnrightforincreasingthevolume.

• Shortpresspausesorstartsplayback.

• Longpressentersthese`ngsmenu.

• Pressandturnselectstheinput.

Ashortpressisshorterthan2seconds,alongpressislongerthan2seconds.

BelowisanimageofthescreenyougetwhentheMU1isfullybootedandthereisnoRoonremoteconnectedyet.

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WhenaRoonremotesuchasatabletisconnectedtotheMU1RoonCoreandmusicisplaying,thetrackinforma7onandprogressbarisshownasinthepicturebelow.

InMusicView,thedisplayoffersthefollowinginforma7on:

• Samplerateandformat1

• CurrentusersetvolumeindB

• MismatchvolumeindB2

• Streamerservice3

• Ar7st

• Song7tle

• Albumname

• Progressbar

• Current7mestamp

• Tracklength

1Thisistheindicatedfileorstreaminforma7onbyRoon.TheoutputoftheMU1mayrunatahighersampleratebecauseoftheop7onalupsamplingintheFPGAoftheMU1.

2Themismatchshowsthedifferencebetweentheusersetvolumeandtheactualvolume,forinstancewhenloudnessnormaliza7on(tobeimplemented)affectsthefilevolume.Italsoindicatesa-10dBaQenua7onwhenpreviewingasource.

3AtthemomentonlyRoonissupported.

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Whenthereisnoaudioplayingandthequeueisempty,theprogressbarwillnotbeshown.

WhenturningtheMU1maincontrolknob,thevolumechangesandthetrackprogressbarattheboQomistemporarilyreplacedbyabarthatindicatesthecurrentvolumese`ng.

IfanLS1isconnected,theMU1willsendvolumecontroldatatotheDSPoftheLS1viaitsproprietarycat5cable.Ifvolumecontrolisac7vatedforoneormoredigitaloutputs,theFPGAchipperformsavolumeaQenua7onathighprecisionfortheseoutput(s).See‘Se`ngsmenu[3/5]’forselec7ngvolumecontrolonthedigitaloutputs.

MarkthatvolumecontrolisdisabledwhenvolumecontrolonthedigitaloutputsisturnedoffandnoLS1isconnected,orwhenDoPisturnedon(see‘Se`ngsmenu3/5’forinforma7onaboutDoP).

Alsonotethattheusersetvolumeindica7oninthetoprightcornerhasamaxlevelof+23.5dBwhenanLS1isconnectedand0dBwhennoLS1isconnected.IntheLS1case,+23.5dBcorrespondsto“100”onthevolumesliderintheRoonapp.Youwouldnormallyneverreachthislevel,itshouldonlybeusedformusicwithverylowaverageloudness.Yournormallevelwillbearound0dBorevenlower.ForLS1users,this0dBlevelisadjustedtothetradi7onalacous7creferenceplaybacklevelinmasteringstudiosandlevelsabove+8dBwilladdposi7vegainintheLS1DSP.

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Foruserswhoconnectedathird-partyDACtodigitaloutput1or2andhavenoLS1connected,thescaleautoma7callychangesto0dBmax,whichreadsas“100”intheRoonapp.

Sourceselec3onBypressing,holdingdownandthenrota7ngthemainknobyouenterthesourceselec7onmenu.Hereyoucanselectsources.Toleavethismenujustreleasethemainknobwhenthedesiredinputisselected.

DependingonwhetheranLS1isconnectedthereare2or3sourcecategoriesvisibleandeachhasoneormoreinputs.Thelistbelowshowseachcategoryandtheiravailableinputs:

• LS1:

◦ LS1Analogue

◦ LS1Digital1

• Streamer:

◦ Roon

• Digitalin:

◦ AES-XLR

◦ AES-RCA

◦ Toslink

Byturningthemainknob(whileholdingitdown)thedifferentsourcesareselected.Ifyou‘hover’overacertaininputthisinputwillbeselectedinpreviewmodeaTer1second,thismeansthatyoucanlistentotheselectedsource(at10dBlowervolumethanthecurrentse`ng)tocheckifthemusiconthisinputistoyourtaste.Whenreleasingthemainknobtheselectedinputisconfirmedandthevolumereturnstothenormalse`ng.

Note:LS1usersmayno3ceashortglitchwhenaudi3oningtheToslinkinput.TheToslinkinputisdesignateda‘LS1low-latency’input.ThisbecauseitismostoUenusedforTVaudio,andlowerlatencyoffersbeaersynchronisa3onwiththevideo.TheLS1’sstandardphaselinearcrossoverhas

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40mslatencyforathreewaysystem,andfortheMU1Toslinkinputthisisautoma3callychangedtoatradi3onalcrossoverwithalmostnolatency.Thischangemaycauseashortglitchsound.PleaserefertotheLS1manualformoreinforma3onaboutitslowlatencymode.

TheMU1willremembertheselectedsourcewhenshu`ngdownthesystem.WhenyoupoweruptheMU1itwilltrytoselectthismemorisedsource.IfitwasasourceontheLS1(AnalogorDigital)thissourcewillbeselectedassoonasyourLS1isdetected.NotethatifyouoperatetheMU1beforetheLS1isdetected,theMU1willautoma7callyfall-backtothe‘Roon’sourceselec7on.

WhenthereisnoLS1connected,thesourceselec7onmenuwilllookliketheimagebelow.MarkthatinthispicturetheMU1doesnotdetectasignalonthedigitalXLRinputand“NoSignal”isshowntopleT.Whenthereisasignalthereceivedsamplerateisindicatedhere.

Note:WhenyouselectanLS1orDigitalInsource,theMU1willautoma3callypauseRoon.Markthatinthiscaseitiss3llpossibletostartRoonplaybackintheRoonApp.Thisisnotanintendedusecase,sopleasemindthefollowing:ifyouselectedanLS1input,RoonplaybackwillbecomeaudibleonDigitalout1and2.IncaseyouconnectedaDACtooneoftheseoutputsyouwillhearmusicbutthetrackinforma3onisnotshownonthedisplay.IfyouselectedaDigitalInsource,RoonwillnotplayproperlysincetheFPGAboarddoesnotrequestaudiodatafromtheinternalPCinthismode.AsaresultRoongetsconfusedandjumpstothenexttrackintheplaylistatirregularpace.TherewillbenodamagedonetothesystembutwerecommendtoonlystartRoonplaybackintheAppwhenRoonisselectedasasource.

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MenuViewBypressingandholdingthemaincontrolknobfor2secondsorlonger,theMU1displayentersthe‘MenuView’mode.

Se$ngsmenu[1/5]:Standby

InthisfirstmenuyoucanputtheMU1instandbymode.

• Turnrighttogotothesecondmenu.

• Ashortpress(‘confirm’)willputtheMU1instand-bymode.

◦ WhentheMU1isinstand-byyoucansimplypressorturnthemaincontrolknobtoini7atestart-upofthesystem.

• WithalongpressyouwillexitthemenuandgobacktotheMusicView.

Wheninstand-bythepowerconsump7ondecreasesandthescreenisturnedoffaTerashortanima7on.Theinternalelectronicsaremostlyshutdown,butsomeofits7llfunc7ons.Ifyouliketocompletelyturnoffthesystem,switchoffthedevicewiththesmallmainspowerbuQonontherearofthedevice.AlwaysturnoffthesystembeforeunpluggingthepowercordtopreventdamagetoyourMU1computersystem!

Hint:ThewhiteLEDonthefrontindicatesifthedeviceisinstand-by(LED‘breathes’)oriftheMU1isshutdown(LEDoff).

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Se$ngsmenu[2/5]:Help

ThisHelpmenushowsthepictogramsthatareusedintheMU1foropera7ngthemainknob.AttheboQomofthescreenthecurrentnetworkinforma7onisshown.TheindicatedhostnamedependsontheserialnumberofyourMU1.IftheIPaddressshows‘unknown’,thereisnonetworkconnec7onandinthatcasetheMU1cannotbefoundbytheRoonAppinyourtabletorsmartphone.Pleasecheckthenetworkconnec7onofyourMU1.

• TurnleTtogotothefirstmenu,turnrighttogotothethirdmenu.


Se$ngsmenu[3/5]:SeWngs

Inthismenuyoucanchangeopera7onalse`ngsoftheMU1.

• TurnleTtogotothesecondmenu,turnrighttogotothefourthmenu.


• Tochangeanyofthesefourse`ngs,applyashortpressonthemaincontrolknob.Youwillthenenterthemenuandtheselectedop7onwillbehighlighted.Inthenextimageyoucanseethatthefirstop7onishighlighted.

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• Toselectanotherop7on,turnthemainknobun7lthedesiredop7onishighlighted.To

changeit,pressthemainknobbriefly.

• Toleavethismenu,applyalongpressofthemainknob.

Oversampling:Thereare3op7onsfortheoversamplingop7on:Original(nooversampling),2FS(two7mesoversampling)and4FS(four7mesoversampling).

OriginalmeansthattheFPGAdoesnottouchthebitsoftheaudiowhenpossible.MarkthatDSDratesand8FS(DXD)wills7llrequiredownsamplingto4FS,andofcoursethebitswillbealteredifdigitalvolumecontrolisengaged(seethenextmenuitem).

2FSoversamplingmeansthat44.1and48kHzaudiowillbeupsampledto88.2kHzresp.96kHz.4FS,8FSandDSD(uptoDSD128)materialwillbedownsampledtotheserates.Audiothatisalready2FSwillbeleTuntouched.This‘2FS’op7onisintendedtobeusedwithDACsorac7ve‘digital’loudspeakersthatdonotsupport4FSorthatworkbeQerwitha2FSsource.

4FSoversamplingmeansthataudiowillbeupsampledto176.4kHzor192kHz.8FSandDSDmaterialwillbedownsampledtotheserates.Audiothatisalready4FSwillbeleTuntouched.Thisop7onisthedefaultandrecommendedse`ngfortheMU1.

Note:FPGAresamplingto2FSissupporteduptoDSD128.Whenswitchingtothe2FSop3onthelivepreviewofDSD256andhigherwillcausenoiseaslongasyou’reinthemenu.Whenleavingthemenu,Roonwillberestartedtore-configuretheaudiocard.DownsamplingofDSD256fileswillfromthenonbetakencareofbyRoon.Whenchangingfrom2FSto4FS,resamplingRoonisagainrestartedwhenleavingthemenuandDSD256downsamplingintheFPGAisthenagainsupported.

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Toselectyourdesiredse`ng,turntheknobandtheselec7onwillbehighlighted.Doashortpresstoconfirmandexit.Alongpressletsyouleavethemenuwithoutchangingthese`ng.

Volumecontrolondigitalout1and2:Inthismenuyoucanselectwhichdigitaloutputshouldhavedigitalvolumecontrol.VolumecontrolintheMU1offersagreatuserexperiencewhencombinedwithRoon’sremotecontrolcapabili7es.Thisvolumecontrolisperformedatveryhighresolu7onintheMU1’sFPGA.Youmightwanttocompareitsqualitytothena7vevolumecontrolofyourDAC.

VolumecontroloftheLS1outputisalwaysdoneintheLS1andcannotbeswitchedoff.

Hint:whenusingtheMU1asadigitalsourcefora‘digital’loudspeakerthathasonboarddigitalprocessingsuchascrossoverfilters,itisrecommendedtodisabletheMU1volumecontrolsothatthespeakerwillreceivetheaudioatfullwordlength.

• Turnthemainknobtoselectthedigitaloutputofwhichyouwanttochangethese`ng.

• Useashortpresstochangethese`ng,thiscanbeonoroff.

• ToleavethemenupresslongonthemainbuQon,theshownse`ngswillbesaved.

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DoPonAES:“DoP”isbrieffor“DSDoverPCM”.Itisastandardfortranspor7ngDSD64audiooveranAES3orspdifPCMdigitalaudioconnec7on.SomeDACssupportthisformatandtheMU1isabletoforwardDSD64materialunalteredtotheseDACs.MarkthatvolumecontrolisimpossibleonDSDsignals,hencetheDoPop7onisdisabledwhenvolumecontrolondigitalout1or2isturnedon.Toavoidconfusion,volumecontrolonPCMsourcesisdisabledaswellwhenDoPisenabled.SincetheGrimmLS1doesnotsupportDoP,theDoPop7onwillbedisabledwhenanLS1isconnected.IfDoPisturnedoff,DSDmaterialwillbedecimatedtoPCMbytheFPGAwithveryhighresolu7on.

Useashortpresstochangethecurrentse`ng.

LED:ThebrightnessoftheLEDonthefrontoftheMU1canbeturneddownwiththisop7on.Thisinfluencesthebrightnessbothinopera7onandinstand-bymode.

Turnthemainknobclockwisetoincreasethebrightnessandan7-clockwisetodecreasethebrightness.PleasenotethattheLEDcannotbeturnedoffcompletelytofacilitateshowingwhethertheMU1isinopera7on/stand-byorpoweroff.

• Ashortpressconfirmsthecurrentse`ng.

• Toleavethese`ngasitwas,presslong.

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Se$ngsmenu[4/5]:So]wareVersionandUpdate

InthismenuyoucanviewthecurrentsoTwareversionandstartanupdate.TheMU1automa7callychecksforanupdateeveryhourandalsowhenenteringthismenupagefrommenupage[3/5].IftheMU1ischeckingforupdates,thisisshownintheboQomofthismenu.

IfyoursoTwareisuptodatethisisindicatedinthedisplayandtheboQomleTiconisgreyedout.

ThesoTwareversionsofCTRL(ControlsoTware),FPGAandUC(Microcontroller)arealsoshowninthismenu.WhenyouexperienceproblemswithyourMU1wemayaskyoutosendusthisinforma7on.

• TurnleTtogotothethirdmenu,turnrighttogotothefiThmenu.


Theimagebelowisshownwhenthereisanupdateavailable.

Incaseanupdateisavailableanddownloaded,thetext“Updateavailable”isshown.

• Starttheupdatewithashortpress.ATerreadingthewarningmessage,confirmwithanothershortpress.

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Pleasenote:Dependingonthetypeofupdatetheinstallcantakeuptoabout15minutes.Duringthis7meyouwillnotseeinforma7ononthedisplay,thepowerLEDisoffandthepowerbuQononthebackisdisabled.Pleaseremainpa3entanddonotunplugthedevicewhileupda3ngsincethiscausestheupdatetofailandtheprocedurehastostartagainwhenthedeviceispoweredup.

DuringtheupdateprocesstheinternalPCwillshutdownanditwillrebootatleastonce.Whentheupdateiscompletethesystemwillturnbackoninnormalmodeandshowtheupdatestatusbriefly.

UpdatesforthirdpartysoTwarelikeRoonisnotincludedintheMU1soTwareupdate,thisisdoneseparatelyviatheRoonApp.

Note:TheMusicViewdisplaywillshowthetext‘Updateavailable’whenthereisanewupdate.

Se$ngsmenu[5/5]:Support

Inthismenuyoucanac7vateSupportMode.Thisshouldonlybeac7vatedwhenyouhavereportedaproblemwithyourMU1toGrimmAudioandourpeopleaskedyoutoenterSupportMode.InthismodeGrimmAudioengineerscangetremoteaccesstoyourdevicetohelpsolveyourproblem.

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• Ac7vateSupportModewithashortpressonthemaincontrolknob,confirmbyanothershortpress.TheMU1willrebootinSupportModeandacon7nuousanima7onscreenisshownonthedisplay.


Note:WhiletheMU1isinSupportmode,thewhitedotanima3onwillkeeprunningandnootherinforma3onisshown.

Privacystatement:

SupportModerebootstheMU1andestablishesasecureconnec3ontoaGrimmAudioserver.Throughthissecureconnec3onwecanlogintoyourdevice,readlogfilesandchangeseBngs.GrimmAudiowillnotcopyinforma3onfromyourMU1inanyformwithoutyourconsent.GrimmAudiowillnevershareyourdatawithanythirdparty.

Whenyouac7vatedSupportModeandwishtoreturntonormalmode,pressthepowerbuQononthebackoftheMU1toturnoffthedevice,andpressthepowerbuQonagaintoboottheMU1innormalmode.GrimmAudiohasnoaccesstoyourMU1anymoreassoonasyoupoweredoffthedevice.

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©2020,GrimmAudioBV.Allrightsreserved

Reproduc7oninwholeorinpartisprohibited.Specifica7onssubjecttochangewithoutno7ce.

GrimmAudio,Eindhoven,TheNetherlandsGeneralques7ons:[email protected]:[email protected].+31402131562

ForsoTwareversionV1.2.14J.V.andE.G.04/11/20

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mu1 software manual, to be read next to the hardware manual - grimm audio · 2020. 11. 4. · audio...

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