Bedienungsanleitung Focusrite VRM Box (Seite 8 von 8) (Englisch)

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Performance specications

Headphone Outputs (Outputs 1-2)

• Outputimpedance:<10Ohms

• Poweroutputinto150R:15mV

• Poweroutputinto50R:30mW

• THD+N:-100dB(0.001%)(-1dBFSinput,20Hz/22kHz 

bandpasslter,150Rload)

• SignaltoNoiseRatio:>105dB

S/PDIF Digital Input

• AutomaticSampleRateconversion

• Supportedsamplerates:continuousfrom32kHzto192kHz

• THD+N:<-110dBanysamplerate

Crosstalk (Channel Isolation)

• Anyoutputtooutput:>100dB

Digital Performace

• D/ADynamicRange:120dB(A-weighted)

• MeasuredD/ADynamicRange:108dB(A-weighted)

• ClockSource:InternalClockonly

• Clockjitter<250picoseconds

• SupportedSampleRates:44.1kHz&48kHz.

• 2inputchannelstocomputer:S/PDIF(2).

• 2outputchannelsfromcomputer:Headphones(2).

Connectors and Controls

• StereoS/PDIFinputonRCA

• StereoHeadphoneOutputon¼”TRS

• HeadphoneOutputLevelcontrol(analogue)

• 4-pinUSB2.0compatiblesocket

Indicators

• 1GreenLEDIndicator:

  Flashing:Unitnotinstalledcorrectlyonhost

  Off:VRMeffectsturnedoff

  On:VRMeffectsturnedon

Power

• BuspowerfromUSBbus.

Weight and Dimensions

• Dimensions:68mmx25mmx68mm(WxHxD)

• Weight:123g

Latency and CPU information

TheVRMBoxprocessingtakesplaceatadriverlevelonyourcomputer.

Thisprocessincursa64samplelatency(about1ms).TheVRMprocessing

alsousesacertainamountofCPUresources.

The VRM Box driver will also add additional latency. This latency will

dependonhowyouusetheVRMBox:

WhenusingtheVRMBoxasyouraudiointerfaceinyourDAW,thelatency

youexperiencewillbedependantontheaudiobuffersizeyousetin

yourDAW,andinmostDAWstheactuallatencygureisdisplayedinthe

preferences.Iftheaudiobuffersizeissettolessthan64samples,thenthe

VRM processing does not have enough time to do the processing and no

audiowillpass.VRMCPUrequirementsaremuchhigherwhentheaudio

buffersizeissettoolow,soitisrecommendedthatabuffersizeof512

samples(Mac)or10ms(Windows)shouldgivethebeststartingpoint.

WhenusingtheS/PDIFinput(receivingaudiofromanotheraudiointerface),

thelatencygurewillbedependantontheaudiobuffersizeyousetinyour

DAWforthatinterface,PLUSadditionallatencyfromtheVRMBox.Inthis

case,therewillbelatencyincurredfromthetransferofS/PDIFaudiosent

fromtheVRMBoxviaUSBusingtheVRMaudiodriver,throughtheVRM

processing,thenbacktotheVRMBox.Thetotalroundtriplatencyislikely

tobeintheregionof20ms(dependingoncomputerspecs).

FormoredetailedinformationpleaserefertotheFocusriteanswerbase:

www.focusrite.com/answerbase

FocusriteisaregisteredtrademarkofFocusriteAudioEngineeringLimited.

TheFocusritelogo,VRMVirtualReferenceMonitoringandtheVRMlogo

aretrademarksofFocusriteAudioEngineeringLimited.

Allotherproductnames,trademarks,ortradenamesarethemarksoftheir

respectiveowners,whichareinnowayassociated,connectednorafliated

with Focusrite or its VRM Box product. These other product names, trade

marks,andtradenamesareusedsolelytoidentifyanddescribethethird

partyloudspeakersystems,thesonicbehavioursofwhichwerestudiedfor

the VRM technology incorporated within the VRM Box, and to accurately

describeanelementoffunctionalitywithintheVRMBox.

The VRM Box is an independently engineered technology which utilises

Focusrite’sVRMVirtualReferenceMonitoring(Patentappliedfor)toac-

curatelymeasureexamplesofthesonicimpactoforiginalloudspeaker

systemsuponanaudiostream,soastoelectronicallyemulatetheperform-

anceoftheoriginalproductstudied.Theresultofthisprocessissubjective

andmaynotbeperceivedbyauserasproducingthesameeffectsasthe

loudspeakersystemsstudied.

Focusrite VRM Box Seite 8

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