Kurzweil PC3LE8 Specifications download pdf (Page 273)

Keymap and Sample Editing

The Keymap Editor

12-1

Chapter 12

Keymap and Sample Editing

The Keymap Editor

TheKeymapEditorletsyoucustomizethePC3LE’sfa ctorypresetkeymapsandsavethemto

RAM.Youcanalsobuildyourownkeymapsfromscratch(seeBuildingaKeymap on page 12‐7.)

Keymapsareanintegralpartofeverylayerofaprogram.Eachkeymapcontainsasetof

parametersdeterminingwhichsample(s)

thePC3LEwillplaywhenyoutriggeranote.Each

layerhasatleastonekeymap,butitcanhavetwokeymapswhenyou’reworkingwithstereo

samples.Eachofthesestereokeymapsusestwoofthe128availablevoices.

Eachkeymapconsistsofasetofkey(note)ranges—C4

toG4,forexample.Theentirespanof

eachkeymapisfromC0toG10.Eachrangehasasamplerootassignedwithintherange.Each

samplerootisadistinctROMsample.Withineachkeyrange,thesamplerootistransposedup

anddowntoplay

oneachoftherange’snotes.Youcanvieweachrangebychangingthevalueof

theKeyRangeparameterontheKeymap‐editorpage.Youcanmixsamplesofdifferenttimbres

withinasinglekeymap,andeventuneindividualkeystoanypitchbydefiningkeyrangesto

singlenotes

andassigningsamplestoeachofthosenotes.

Whenyoutriggeranote,thePC3LEidentifiesthekeyrangewheretheNoteOneventoccurred.

Italsocheckstheattackvelocityvalueofthenote.Itthenaddressesitsmemory,andretrieves

thesamplerootthat’sassignedtothatkeyrange

andattackvelocityvalue.Ifthenotethat’s

triggeredisnotthenotewherethesamplerootisassigned,thesampleistransposedtoplayat

thecorrectpitch.ThePC3LEthengeneratesthedigitalsignalthatrepresentsthesoundofthe

note.Atthispointthekeymap’sjobis

done,andthesignalproceedsthroughthelayer’s

algorithmandontotheaudiooutputs.

Youcanassignasmanykeyrangestoakeymapasyoulike,evencreatingaseparaterangefor

eachnote.Thiswouldallowyoutotuneeachkeyindependent ly,tocreatemicrotonaltunings.

Forkeymaps

thatuseasingletimbre,liketheGrandPiano,there’sakeyrangeforeachsample

rootstoredinmemory.Foracousticinstrumentalsounds,themorekeyrangesyouhavefora

keymap,themorerealisticthesoundwillbe,sincetherewillbelesspitchshiftingofthesample

root

withinthekeyrange.

Ofcourse,youcanassignsamplerootswithdifferenttimbreswithinthesamekeymap.Manyof

thedrumkitkeymapsinROM,forexample,haveabout20keyranges,withseveraldifferent

timbresassignedasthesampleroots.Youcanalsocreateakeymapwithasingle

keyrangethat

spansfromC0toG10,ifyouwanttostretchasinglesamplerootfromC0toG10.Keepin

mind,however,thatsamplescanonlybetransposedupwardbyanoctavefromthesample’s

originalpitch.Samplescanbetransposeddownwardwithoutlimi t.

Think

ofakeymapasifitwereasinglepieceofstring,dividedintodifferentsectionsthatadjoin

oneanother.Sectionscannotoverlap.IfyouhaveonerangethatgoesfromC4toF4andanother

thatgoesfromF#4toC5,thenifyouchangethefirstrangeto

beC4toG4,thesecondonewill

changetobeG#4toC5.

Also,youcan’thave“nothing”assignedtoakeyrange.EvenifitisSilence(#999),therewill

alwaysbeasampleassignedtoeveryrangeinthekeymap.Thisissomethingtowatchoutfor

when

creatingdrumprograms.Forexample,let’ssayyouarecreatingaprogramwith20layers.

Eachlayerhasitsownkeymap,whichhasjustonesampleassignedtopartofthekeyboardwith

therestofthe keyrangeassignedtoSilence.Makesurethatyoulimitthenoterangeof

each

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