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3.2.3.4ALC(AutomaticLevelControl)
OutputAmplitude
InputAmplitude
Compression
( 2dB, 6dB, 12dB)- - -
Expansion
(0dB,+6dB,+14dB,+24dB)
0dB
0dB
DigitalAttenuation(ATP)Options
DigitalAttenuation(ATP)Options
MovetheL-chandR-chsliderstoadjustthegainoftheincomingdigitalsignalspriortoconversionbythe
DAC.
•TheL-chslideradjuststheDACdigitalattenuatorlevel
•TheR-chslidercontrolstheDACdigitalattenuatorlevel
•Selecttheoutputchanneltobeeitherstereoormono
•Thedigitalboostoptionenablesagaincontrolof0dB,+6dB,+12dB,or+18dBfortheDACdigitalinput
Figure3-11showstheAutomaticLevelControl(ALC)functionmenutab.
Figure3-11.ALCFunctionMenuTab
AutoLevelControl(Record)Options
SelectRecoverytimeandAttacktimeusingtherespectivedrop-downmenuandcorrespondinggain
controlforeachoptiontousetheautomaticlevelcontrolfunction.
ALCcompressionandexpansioncharacteristicsareshowninFigure3-12.
Compressionisdefinedasavoidingdegradationofsoundqualitybysaturationwhentherearestrong
orexcessivelylargesounddatainput.
Expansionmeanstoboostweakorlowinputdatainordertoadjustthemoderateamplitudelevelfor
recording.
Figure3-12.ALCCompressionandExpansionCharacteristics
Set-UpGuide 30SBAU127–July2007
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