Kurzweil PC3K Series - Tremolo and AutoPan

9-22
Effects
Tremolo and AutoPan
Tremolo and AutoPan
TremoloisamplitudemodulationusinganLFO.AutoPanmovesthesignalbetweentheleftand
rightchannels,usinganLFO.Theyhaveseveralparametersincommonandseveralunique
ones.
LFORateistherateoftheLFO.Therangeis0to10.00Hz,orinTremoloBPMalgorithm,0
to
12.00xthetempo.
RateScalemultipliesthespeedoftheLFOrateintotheaudiorange.Therangeis1to25088x.
Whenabove16x,thevaluesincrementinsemitonesteps.WhentheLFORateissetto1.00Hz,
thevalueofthisparameterisequal
totheLFOfrequencyinHertz.
LFOShapeisthewaveformtypefortheLFO.ChoicesareSine,Saw+,Saw‐,Pulse,andTri.
LFOPlsWidorPulseWidth.WhentheLFOShapeissettoPulse,thissetsthepulsewidthasa
percentageofthewaveformperiod.Whenthe
widthissetto50%,theresultisasq uarewave.
Thisparameterhasnoeffectifotherwaveformtypesarechosen.Rangeis0to100%.
AutoPan
Origindeterminestheaxisforthepanningmotion.At0%,thepanningiscenteredbetweenthe
speakers.Positivevaluesshifttheaxistotheright,whilenegativevaluesshiftittotheleft.At
‐100%or+100%(t herangelimits),thereisnopanningaction.
ImageWidthisthewidthofthe
originalinputprogrammaterialbeforeitisauto‐panned.At0%
(minimum),the inputimageisshrunktoasinglepointsource,allowingmaximumpanning
excursion.At100%(maximum),theoriginalwidthismaintainedsonopanningcanoccur.
PanWidthcontrolstheamountofpanexcursion.Itisthepercentage
oftotalpanningmotion
availableafterOriginandImageWidthareset.Rangeis0to100%.
CentrAtten(Attenuation)istheamountthesignalleveldropsasitispannedthroughthecenter
ofthestereoimage.Forthesmoothesttracking, a widelyacceptedsubjectivereferenceis‐3dB.
Valuesabove‐3dBwill
causesomewhatofabumpinlevelasanimagepassesthroughthe
center,whilevaluesbelow‐3dBwillcauseadip.Rangeis‐12to0dB.
Tremolo
DepthcontrolstheamountofattenuationappliedwhentheLFOisatitsdeepestexcursion
point.Rangeis0to100%.
LFOPhaseshiftsthephaseofthetremoloLFOrelativetothebeatreference.Rangeis0.0to
360.0degrees.
50%Weightistherelativeamountofattenuationaddedwhenthe
LFOisatthe‐6dBpoint.This
causestheLFOshapetobowup(positivevalues)ordown(negativevalues).Ra nge is‐16to
3dB.
L/RPhasesetsthephaserelationshipofthechannels.“In”flipstheleftchannel’sLFOoutof
phase,withtheresultthattheeffectturns
intoanauto‐balancer.“Out”leavestheleftLFOalone.
Pitcher
Pitcherappliesafiltertotheinputsignalwhichhasaseriesofpeaksinthefrequencyresponse.
Thesepeaksarenormallyadjustedsothattheirfrequenciesareallmultiplesofaspecific,
selectablefrequency,whichimposesastrongsenseofpitchattheselectedfundamental
frequency.