User Manual

Program Mode
Editing VAST Programs With KVA Oscillators
6-57
Oscillator Specific Control And Modulation Parameters:
SeveralKVAoscillatorsalsohavetheirownmodulationparametersthatmustbeaccessedto
controltheoscillator’sintendedfunction.Belowisalistoftheseoscillatorsandtheirdistinctive
parameters,groupedbyblocksize.Thoughthefollowingparameterscouldbeleftatone
setting,utilizingoneoftheDSPCTLor
DSPMODtechniquesdescribedintheaboveexamples
willexposeawiderrangeofexpressionfromeachoscillator.
1 Block:
LPNOIZ
Anoisegeneratorcombinedwithalowpassfilter.UsetheNoizFrqparametertocontrolthecut
offfrequencyofthefilter.
NOISE
Asimplenoisegenerator.UsetheNoiseparametertocontrolthenoiseinitialamplitude.
SW+SHP(Sawtooth+Shaper)
ThisoscillatoriscapableofbasicFMSynthesis.
ItsdistinctiveparameterisPch Coar.This
oscillatormustcomeafterthesoundsourceinanalgorithm(eitherkeymap oroscillator)in
ordertoheartheeffectofPchCoar,whichcanradicallychangewhatevertheoscillator receives
asaninput.WorkswellplacedafteraSinesource.
SINE+[Aliased(not
recommended)]
Sameas2blockversion,butwithouttheSine+Amparameter.
SAW+[Aliased(notrecommended)]
Asawoscillatorthatcanaddaninputsignaltoitsoutput.
NOISE+[Aliased(notrecommended)]
Anoiseoscillatorthatcanaddaninputsignaltoitsoutput.
2 Block:
SINE+
Asineoscillatorthatcanaddaninputsignaltoitsoutput. TheSin+PchandSine+Am
parametersaffectthepitchandamplitudeofthesinewaveformwithoutaffectingthe pitchof
theinputsource.
RESNOISE
Anoisegeneratorcombinedwithalowpassfilterwithresonancecontrol.Use
theNoizFrq
parametertocontrolthecutofffrequencyofthefilter.UsetheNoizQparametertocontrolthe
amplitudeoftheresonance(aboostorcutatthecutofffrequency.)Onetechniqueforuseofthis
functionistosetahighvaluefor NoizQ(so
thatyouhearatheresonancecreateatone,)and
thenontheDSPCTLpagesetC4asaninitialfrequencyforNoizFrq,andsetKeytrkto100ct/key
ontheNoizFrqsubpage.Doingthiscausesthenoiseresonancefrequencytomatch thenoteof
thekeyplayed.
SHAPED
SAW
TheShapedSawoscillatorisasawtoothoscillatorwiththeabilitytomorphitsoutputshape
betweensawtoothandsinewave(withoutcrossfading.)Thisoscillator’sdistinctiveparameteris
Shape,whichcontrolsthemorphing.WithShapesetto0,theoscillatorproducesapure
sawtoothwave.WithSha p esetto127,
theoscillatorproducesapuresinewave.Valuesin
betweenmorphbetweenthetwowaveshapes.
PWM(PulseWidthModulation)[Aliased(notrecommended)]
Thisoscillator’sdistinctiveparameterisPWMWid,whichadjustspulsewidthfromvaluesof1‐
99.WithPWMWidsettoavalueof50,PWMproducesa
squarewave.ThefurtherthePWM
Widparameterissetfrom50,thenarrowerthepulsewidthbecomes,changingtheshapeofthe
outputwaveformandthusalteringtheoscillator’stonalqua lity.