Axis Q1931-E User Manual Page 20

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AXISQ1931–EThermalNetworkCamera
VideoandAudio
SelectMicrophonetouseanexternalmicrophoneorLinetouseaLineindevice,e.g.anaudiomixerformultiplemicrophones
oramicrophonewithabuilt-inamplier,asaudiosource.
TheMicrophonepoweroptionprovidesDCpowerforanexternalmicrophone.Microphonepowershouldonlybeusedwith
microphonesthathavenobattery.Thissettingshouldnotbeenabledwhenusingadynamicorbatterypoweredmicrophone.
Microphonepowerwillnotharmthemicrophone;ifyouareuncertain,tryswitchingitoffandon.Touseaprofessionalmicrophone
requiring48Vphantompower,youneedanexternalpowersupplyandabalanced-unbalancedconverter(audiotransformer)in
between.
UsetheInputgaintocontrolthevolume(dBFullScale)oftheaudioinput.Ifthesoundistoolow,chooseahigherdB,toamplify
thesound.Ifthesoundistoohigh,choosealowerdB.TheLevelbargivesavisualrepresentationoftheaudiosignallevelindB
relativetothefull-scaleinputlevel.
Greenthesignalisatagoodlevel.
Yellowthesignalisbecomingdistorted.
Redthesignalisdistorted.
UsetheEncodingoptiontoselectdigitalaudioencodingformat.
AACrequiresalicenseforbothencodinganddecoding.AACistheleastcomplicatedandmostwidelyusedcodec.If
achievingthebestpossibleaudioqualityisapriority,AACistherecommendedcodectouse.AnAAClicenseisincluded
intheAxisproduct.
G711isanunlicensedstandardcodecthatisusefulwhenintegratingaudiointoaVoIPsystem
G726isanunlicensedspeechcodecthatismostcommonlyusedwithinthesecurityindustry.
TheSampleratedenesthenumberoftimespersecondthesoundissampled.Ahighersampleratewillprovidebetteraudio
quality,butalsorequiresagreaterbandwidth.
SettherequiredBitratedependingontheselectedencoding.Ahigherbitratewillgivebetteraudioquality.Alowerbitrate
mayhavelatencyordelay,butwillrequirelessbandwidth.
Formoreinformationaboutthesesettings,pleaseseetheonlinehelp
.
AudioOutput
AnexternalspeakercanbeconnectedtotheAudio-outconnector(abuilt-inamplierisrequiredforthis).Theoutputcanbe
connectedtoanotheramplierwithspeakers.Astereoconnectormustbeusedfortheaudioout.
ConguretheaudiooutputsettingsunderVideo&Audio>AudioSettings.
Note
Amulti-connectorcable(availablefromAxis;Multi-ConnectorCable(soldseparately))isrequiredwhenconnectingexternal
audioequipmenttotheAxisproduct.
Outputgain-Controlthevolume(dBFullScale)ofthelineaudiooutput.Ifthesoundistoolow,chooseahigherdB.Ifthe
soundistoohigh,choosealowerdB.
AudioClips
AnaudioclipisasoundlethatcanbeplayedwheneventsoccurordirectlyfromtheLiveViewpage.Theaudioclipmustrstbe
uploadedtotheAxisproductorrecordedbyamicrophoneconnectedtotheproduct.
Toadd,download,modifyorremoveaudioclips,gotoVideo&Audio>AudioClips.Formoreinformationseetheonlinehelp
.
ToconguretheAxisproducttoplayaudioclipswhenaneventoccurs,anactionrulemustbesetup.Formoreinformation,see
Events,onpage29.
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