Korg 61key, 73key, 88key Creating time-varying changes (LFO and EG)

Detailed Editing with Programs Creating time-varying changes (LFO and EG)
35
Creating time-varying
changes (LFO and EG)
Using LFOs
YoucanusethecyclicchangeproducedbytheLFO
(LowFrequencyOscillator)tomodulatenumerous
aspectsofthesound.
EachProgramhastwoLFOs:LFO1andLFO2.Thereis
alsoasingleCommonLFO,sharedbybothOscillators.
WhileLFO1andLFO2areseparateforeachvoice,the
CommonLFOissharedbyallvoicesintheProgram.
Thismakesitusefulwhenyouwantallofthevoicesto
haveanidenticalLFOeffect.
YoucanusetheseLFOstomodulatemanydifferent
Programparameters,including:
•Pitch(forvibrato)
•Filters(forwaheffects)
•Volume(fortremolo)
•Pan(forauto‐panning)
TheLFOscanmodulatemanyotherparameters,in
additiontothoselistedabove.
Using the basic LFO
1. AccesstheProgP5:LFO–OSC1LFO1page.
2. SelecttheWavef ormparameter.
UsetheINCandDECbuttonstoscrollthroughthe
differentwaveforms,andlookattheirshapesinthe
graphicdisplay.
Thereareanumberofwaveformstochoosefrom.Each
aresuitedtodifferentapplications:
Trian gleandSinearetheclassicLFOshapesfor
vibrato,tremolo,panning,andfilterwaheffects.
Squareisusefulforgatedonandofffilterandamp
effects,andcancreatetrillswhenmodulatingpitch.
TheGuitarwaveformisdesignedespeciallyforguitar
vibrato;itbendsonlyupwardsfromthebasevalue.
SawandExponentialSawDownaregoodfor
rhythmicfilterandampeffects.
Random1(S/H)createstheclassicsample‐and‐hold
effect,whichisgreatformodulatingaresonantfilter.
3. Afterlookingatthedifferentwaveforms,select
Trian gle.
4. SelecttheShapeparameter,andusetheVALU E 
dialtomovethroughitsdifferentsettings,from
–99to+99.
Noticehowtheshapeofthewaveformbecomesmore
curved,andhow–99emphasizesthelowerpartofthe
shape,and+99emphasizestheupperpart.
5. SelectthePhaseparameter,andusetheVALU E
dialtosweepthroughitsrangeofvalues.
Noticehowthewaveformshiftsfromsidetoside.
Amongotherthings,thisletsyouoffsettheLFOsfrom
oneanotherintime,whichcancreateinteresting
organiceffects.
6. UsetheFreq(Frequency)parametertosetthe
speedoftheLFO.
7. UsetheFadeandDelaysettingstocontroltheway
theLFOsoundsatthebeginningofthenote.
FormoreinformationonLFOs,pleaseseepage42of
theParameterGuide.
AlloftheseparameterscontrolthewaythattheLFO
works.InorderfortheLFOtoactuallyaffectthe
sound,youcanusethededicatedLFOroutingsonthe
Filter,Pitch,andAmppages,orusetheLFOsasAMS
sourcesforawidevarietyofparameters.
Using EGs (Envelope Generators)
Anenvelopecreatesamodulationsignalbymoving
fromoneleveltoanotheroveraspecifiedtime,and
thenmovingtoanotherleveloveranotherperiodof
time,andsoon.
TheProgramincludesthreeEGs,forPitch,Filter,and
Amp.Theseproducetime‐varyingchangesinpitch,
tone,andvolumerespectively.Theycanalsobeusedto
modulateanumberofotherprogramparametersvia
AMS.
Note:Theparametersthat canbemodulatedbyanEG
andtherangeofvalueswilldifferdependingonthe
EGsprovidedforeachsection.
Waveform
Level
Time
note-on note-off
Sutart Level
Attack Time
Decay Time Slope Time
Attack Level
Break Level
Release
Level
Sustain Level
Release Time