Kurzweil PC3K Series - Page 115

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amplit ude.
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.
2 Block:
SINE+
Thisoscillatorhasaneffectonaninputsignalthatissimilartoringmodulation.Itsdistinctive
parametersareSin+PchandSine+Am.Thisoscillatormustcomeafterthesoundsourceinan
algorithm(eitherkeymaporoscillator)inordertoheartheintendedeffectofSin+Pchand
Sine+
Am,whichcanradicallychangewhatevertheoscillatorreceivesasaninput.TheSin+Pchand
Sine+Amparametersaffectthepitchandamplitude ofthesinewaveformwithoutaffectingthe
pitchoftheinputsource,thoughtheseparameterswillhaveabigeffectonhowtheinputsignal
is
processed.
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.