User Manual

6-4

Program Mode

VAST and KB3 Programs

ItisimportanttounderstandthedifferencebetweenVASTprogramsandKB3programs.

VA S T programscontainupto32layers,eachofwhichcontainsakeymaporKVAoscillator.

Keymapsconsistsofanumberofsamplesassignedtoaparticularkeyboardrange.KVA

oscillatorsusepowerfulDSPtogeneratearange

ofsimpleandcomplexwaveforms(seeEditing

VA S T ProgramsWithKVAOscillators on page 6‐53formoredetails.)SeeVA S T Program

Structure belowformoredetailsonVASTprograms.

KB3programsuseamuchdifferentarchitecture.Therearenolayersoralgorithms,justasetof

oscillators(designedtoemulatethetonewheelsin

aHammondOrgan)thatstartrunningas

soonasyouselectaKB3program.SeeKB3ProgramStructure on page 6‐6formoredetailson

KB3programs.

VAST Program Structure

YoumightwanttotakealookatFigure 6‐1onpage6‐5,whichdepictsthehierarchyofaVAST

program,fromindividualsamplesallthewayuptosetups,whichcancontainupto16

programs.

EveryVASTprogramcontainsatleastonelayer.Alayerconsistsofakeymapandan

algorithm

forprocessingthesamplescontainedinthekeymap.Eachsampleisaseparatedigitalrecording

ofsomekindofsound:musical,vocal,industrial,anysoundatall.Individualsamplesare

assignedtospecifickeyranges(fromA2toD3,forexample),andarealsoassignedtobe

triggered

atspecificattackvelocities.Theseassignmentsconstitutethekeymap.

Whenyoutriggeranote,thePC3 Klookstothekeymapofeachlayerofthecurrentlyactive

VASTprogram(s)todeterminewhichsamplestoplay.Thesoundenginethenfetchesthe

requestedsamplesandgeneratesadigitalsignalrepresentingthesound

ofthesamples.This

signalfirstpassesthroughtheDSPfunctionsthatmakeupthealgorithm.Itthenpassesthrough

thePC3K’seffectsprocessor,andfinallyappears—withsomelevelofeffectsappliedtoit—at

oneormoreoftheaudiooutputs.

ThelayeristheVASTprogram’sbasicunitofpolyphony,

thatis,eachlayerconstitutesoneofthe

128voicechannelsthePC3Kcanactivateatanytime.Ifyouhaveaprogramthatconsistsoftwo

layerscoveringthenoterangefromA0toC8,eachkeyyoustriketriggerstwovoicechannels.

Note:Oneexceptiontothis

structureiswhenusingaKVAoscillator,thesoundsourceforthatlayeris

notderivedfromakeymap,butisgeneratedatthealgorithmstage(thoughkeymapinformationisstill

usedtosetkeyrangeandmaximumamplitude.)Afterthis,thestructureisthesameasdescribedabove.

See

EditingVA S T ProgramsWithKVAOscillators on page 6‐53formoredetails.