Adl Gt40 alpha Instruction Manual

GT40USBDAC Q&A

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Q1.ComputerdoesnotrecognizetheGT40

A1‐1.Notconnectedcorrectly

（RefertomanualandcheckiftheGT40isconnectedcorrectlytothecomputerviaUSBcable.）

A1‐2.ThereisaproblemwithaUSBHub

(ADLdoesnotrecommendtheuseofaHubwhenconnectingtheGT40toacomputer)

A1‐3.ComputerdoesnotrecognizetheGT40asboththeplaybackandrecordingUSBdevice

（DisconnecttheUSBcableandreconnectafter10seconds.IfitstilldoesnotrecognizetheGT40restart

thecomputer.）

Q2.SystemerroroccurswhenswitchingbetweensettingsontheGT40

A2.Switchingbetweensettingsduringplayback

（ThereisasmallpossibilityofanOSsystemerrorwhenswitchingbetweensettingsontheGT40duringplayback.

Avoidswitchingduringplayback.）

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Q3.Thereisnosound

A3‐1.Thesoundhasbeenmuted

（Openthevolumecontroltabonthecomputerandunselectmute.）

A3‐2.Volumeoutputsettingistoolow

（Openthevolumecontroltabonthecomputerandsetthevolumetomaximum.）

A3‐3.Anotherdeviceissetasthedefaultplaybackdevice

（OpentheSoundandAudioDevicepropertiestabandselectUSBAudioDeviceGT40USBDACasdefault

playbackdevice.）

A3‐4.Thereisaproblemwiththeexternalamporspeakers

（ChecktheconnectionbetweenexternalcomponentsandtheGT40LINEOUTRCAjacks.）

A3‐5.Headphonesarepluggedintothe6.3mmphonejackonthefrontpaneloftheGT40

（Whenheadphonesarepluggedin,therewillbenosignaloutputformtheLineOutjacks.）

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Q4.Nosoundfromcomputerinternalspeakers

A4.USBdeviceissetasthedefaultforplayback

（WhentheGT40isselectedasdefaultaudiodeviceforplayback,therewillbenosoundfromthecomputer

speakerswhichisperfectlynormal.）

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Q5.Nosoundthroughheadphones

A5‐1.ThevolumeissettoolowontheGT40

（AdjustthevolumeonthefrontoftheGT40totheappropriatelevel）

(WhenadjustingvolumelevelforheadphonestheLineOutRCAjack’svolumelevelisalsoadjusted)

A5‐2.TheGT40powerisnotswitchedon

（PushthepowerbuttonontheGT40frontpanel.Itwillshowasbluewhenswitchedon）

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Q6.Unevensoundbalanceduringplayback

A6‐1.Balanceisnotsetaneutral

（Openthevolumecontroltabonthecomputerandsetthebalancetoneutral–centered.）

A6‐2.Thereisabalanceproblemwiththeexternalamporspeakers

（Checkthebalancesettingsonexternalcomponents.）

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Q7.NosoundfromCD’sintheCD‐ROMdrive

A7.CD‐ROMdrivedoesnothavedigitaloutput

（IfthesystemdoesnotstreamdigitaloutputfromtheCD‐ROMdrive、thentherewillnotbesoundoutputvia

USB.CD‐ROMdrivesandCDtransportsmustbeconnectedtotheLINEINRCAjacksforlisteningwithheadphones)

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Q8.NosoundviaLINEINRCAjacks

A8‐1.Checkthattheconnectionsarecorrect

（ChecktheconnectionbetweenexternalcomponentsandthePhono/LineInput.Iftherearenoproblems

withtheexternalcomponents,thencheckthecableconnection.）

A8‐2.Thereisnosoundoutputfromexternalcomponents

（Checkifthereissoundoutputfromexternalcomponents.）

A8‐3.TheselectorswitchonthefrontoftheGT40lightsupgreen

（Iftheselectorswitchisgreen,thecomputerissetasthesoundsourceviaUSB.）

A8‐4.IncorrectsettingoftherearpanelInputSelectorSwitch（Phono（MC）・Phono(MM)・Line）

（Selecttheappropriatesettingforyouranaloginputsource.）

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Q9.Notabletorecord

A9‐1.Anotherdeviceissetasthedefaultrecordingdevice

（OpentheSoundandAudioDevicepropertiestabandselectUSBAudioDeviceGT40USBDACasthedefault

recordingdevice.）

A9‐2.Checkthatconnectionsarecorrect

（ChecktheconnectionbetweenexternalcomponentsandthePhono/LineInput.Ifthereisnoproblemwith

theexternalcomponents,thencheckthecableconnections.）

A9‐3.Checkifrecordingsoftware(notsuppliedwithGT40)recognizestheGT40asthedefaultrecordingdevice

※ RecordingsoftwareisrequiredtorecordusingtheGT40.Furutechrecommendsfree‐to‐download

softwareAudacity:http://audacity.sourceforge.net/

A9‐4.ChecktoseeifbothInputandOutputsettingsintheSoundorMIDIapplicationarenotsetto24bit/96KHz

TheTENORchipusedintheGT40hasabandwidthlimitationof12Mbps(USB2.0fullspeedoperation),and

duetothislimitationonlyoneI2Sinputoroutputcanbesetfor24bit/96KHzapplicationatonetime.

Therefore,underthiscondition,forsimultaneousmultiple‐channelapplicationsotherI2Sinterfacesmust

beconfiguredat16‐bit/48KHzor16‐bit/96KHz.Inotherwords,whenrecordingitisnecessarytosetthe

audioInputonthecomputerto24bit/96KHz(PC‐Soundapplication;MAC‐MIDIapplication),butdonotset

nottheaudioOutputto24bit/96KHz.TheOutputshouldbesettoalower16bitresolutionuntilrecording

isdone.Thenwhenyouwanttoplaybackyour24bit/96KHzfilesthroughtheGT40youneedtoresetthe

outputto24bit/96KHzandresettheinputtoa16bitresolution.

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Q‐10.Soundcutsout

A10‐1.Duringplaybackorrecordingthecomputer’sCPUoverloads

（Especiallyduringrecordingmakesureallothercomputerapplicationsareclosed.）

A10‐2.DuringplaybackorrecordinganotherUSBdeviceisconnectedtothecomputer

（ThesoundwillcutoutduringplaybackorrecordingifanotherUSBdeviceisconnectedtothecomputer.）

A10‐3.CPUisunabletoprocessdatafastenough

（IftheCPUdoesnotmeettherequiredspecificationstheexpectedresultsmaynotoccur.IftheCPUmeets

therequirements,butthesoundcutsout,closeallotherapplicationsoradjustsettingsintherecordingsoftware）

A10‐4.ChecktoseeifbothInputandOutputsettingsintheSoundorMIDIapplicationarenotsetto24bit/96KHz.