Kurzweil PC3LE8 Specifications download pdf (Page 107)

Program Mode

The Program Editor

6-55

Setting Up The Sync Square Oscillator:

TheSyncSquareoscillatorisactuallycomprisedoftwooscillators,amasterandaslave,setup

toemulatethewaysyncsquareoscillatorsworkedonclassicanalogsynthesizers.Tocreatea

programusingSyncSquare,selectDefaultProgram,#999.Selectʺnoneʺonthekeymappage.

SelectʺuserʺontheAmpenv

pageforanampenvelope.OntheALGpage,selectAlgorithm5at

thetopofthepage.Usethecursorbuttonstoselectthefunctionblockandusethealphawheel

toselecttheʺSYNCSQUARE(master)>>ʺfunction.Next,pressthe<<softbuttontochangesoft

button

pagesuntilyouseeʺDupLyrʺ.PressDupLyrtoduplicatethelayer,creatinglayer2.In

layer2,ontheALGpage,changethefunctionblocktoʺ>>SYNCSQUARE(slave)ʺ,andsetthe

AltInputparametertoʺLayer1ʺ.ThefinalstepistogotoLayer1

ʹsDSPCTLpageandturnthe

Levelparameterallthewaydown,to‐96dB(thisensuresthatyouwillonlyheartheoutputof

theslaveoscillatoronlayer2,whichistheintendedfunctionofSyncSquare.)

NowtheSyncSquareoscillatorshouldbeworking.TheʺSyncoffʺparameter,SyncOffset,

isthe

mainparameterforshapingthetoneofthissound.Syncoffsetsthesyncoffsetbetweenthe

masterandslavesquarewavesineachcorrespondingoscillator, whichchangestheshapeofthe

waveformoutputbytheslaveoscillator.TheSyncSquareoscillatorismostexpressivewhenthe

Syncoffparameter

modulatedduringperformance.UsetheDSPMODpagetoassignan

envelopeorcontinuouscontrollerliketheModWheelforthisparametertoheartheeffect(see

TheDSPModulation(DSPMOD)Page on page 6‐35,aswellasTheDSPControl(DSPCTL)

Page on page 6‐33andCommonDSPControlParametersinAlgorithmBasics on page 6‐

28,for

detailsonsettingupmodulationandotherwaystocontrolparameters,andseeTheEnvelope2

(ENV2)andEnvelope3(ENV3)Pages on page 6‐48fordetailsonusingenvelopesasmodulation

sources.)SeeAdvancedUseOfKVAOscillatorsbelowforsomesimilarexamplesofhowtosetand

control

modulationforoscillatorspecificfunctionsandotherparameters.

Toadd a DSPfunctiontotheSyncSquareoscillator,youʹllneedtousecascademode.For

example,toaddafilter,duplicateoneofthelayerstocreatelayer3.Onlayer3,selecttheALG

pageandchooseoneof

thecascademodealgorithms,algorithms101‐131.Forthisexample,lets

usealg105withthefilterʺ4PoleMogueLPʺselectedforthefunctionblock.FortheAltInput

parameter,selectLayer2.Thisroutesapre‐LevelparametercopyofLayer2’soutputintoLayer

3.Gotolayer2

ʹsDSPCTLpageandturnitsleveldownto‐96dB(otherwisetheun‐filtered

soundfromlayer2willbeaudibleaswellasthefilteredsoundinlayer3.)Nowyoucanhearthe

SyncSquarefromlayers1and2runningthroughthefilterinlayer3.See

AdvancedUseOfKVA

Oscillatorsbelowforexamplesofhowtosetandcontrolmodulationoffilterparameters.

Advanced Use Of KVA Oscillators

ReadtheKVAsectionsabovebeforemovingontothissection.

IfyouhavetriedtheprogramdescribedaboveinBasicUseofKVAOscillators,youmayhave

noticedthatthereisno

variationinthenotesplayedasidefrompitch.Layersandprograms

createdwithKVAoscillatorscanbecomemuchmoreexpressivebyintroducingvariationwith

DSPmodulation.ForaKVAoscillatorlayer,youcanuseDSPmodulationjustasyouwouldfor

keymaplayers(seeCommonDSPControlParametersinAlgorithm

Basics on page 6‐28,TheDSP

Control(DSPCTL)Page on page 6‐33,andTheDSPModulation(DSPMOD)Page on page 6‐35.)

SeveralKVAoscillatorsalsohavetheirownmodulationparametersthatmustbeaccessedto

controltheoscillator’sintendedfunction.Asidefromthesemethods,KVAlayerscanalsobe

alteredbyusingkeymapswithnatural

amplitudeenvelopes.Seebelowfordetailsoneach

method.

Examples of Simple DSP Control and Modulation:

Selecttheprogram1019VA1NakedPWM P oly,presstheEditbutton,thenpresstheV.A.S.T.soft

buttontoentertheV.A.S.T. ProgramEditor.PresstheALGsoftbuttontoviewthealgorithmand

functionblocksinuse.The3blockPWMoscillatorthatyouseeisgeneratingthesoundinthis

program.Select

theemptyfunctionblocktotherightofthePWMblock,andusethealpha

wheeltoscrolltotheLOPASSfunction.Youshouldimmediatelyhearadifferenceinthesound

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Kurzweil PC3LE8 Specifications Page 107

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