Kurzweil PC3LE8 Specifications download pdf (Page 109)

Program Mode

The Program Editor

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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Shapesetto

127,theoscillatorproducesapuresinewave.Valuesin

betweenmorphbetweenthetwowaveshap es.

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quality.

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Kurzweil PC3LE8 Specifications Page 109

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