Korg Oasys User Manual

Using Filters
65
Intensity(AMSIntensity)specifiesthedepthof
vibratothatwillbeappliedbytheLFOwhen
modulatedbytheselectedAMS(AlternateModulation
Source).Forexample,ifLFO1AMSissettoAfter
TouchandyousetanappropriatevalueforIntensity,
vibratowillbeappliedwhenyouapplypressure
tothe
keyboardorwhenMIDIaftertouchmessagesare
received.
Pitch EG
WhentheIntensityvalueissetto+12.00,thepitchEG
specifiedinthePitchEGpagewillproducea
maximumof±1octaveofpitchchange.
Torealisticallysimulatetheslightchangeinpitchthat
occurswhenastringispluckedorattheattackofa
brassorvocalsound,youcanusetheEGtocreatea
subtlechangeinpitchattheattack.
Portamento
Portamentomakesthepitchchangesmoothlywhen
youplaythenextnotebeforereleasingtheprevious
note.
TheTimeparametercontrolshowlongittakethepitch
tochange.Asthisvalueisincreased,thepitchwill
changeoveralongertime.Withavalueof000,there
willbeno
portamento.
YoucanturnPortamentoonandoffviaSW1orSW2,
byassigningthemtoPorta.SWCC#65.
Using Filters
Thefiltersallowsyoutodiminishoremphasize
specifiedfrequencyareasofthesound.
Thetoneofthesoundwilldependsignificantlyonthe
filtersettings.
Thebasicfiltersettings,includingtherouting,type,
cutofffrequency,andresonance,aresetontheP3:
Filterpage.
Filter Routing
Eachoscillatorhastwofilters,FilterAandFilterB.The
Routingparametercontrolswhetheroneorbothofthe
filtersareused,andifbothareused,itcontrolshow
theyareconnectedtoeachother.
TheSingleroutingusesonlyFilterAasasingle2‐pole,
12dB/octavefilter
(6dBforBandPassandBandReject).
TheSerialroutingusesbothFilterAandFilterB.The
oscillatorfirstgoesthroughFilterA,andthenthe
outputofFilterAisprocessedthroughFilterB.
ParallelalsousesbothFilterAandFilterB.The
oscillatorfeedsbothfiltersdirectly,
andtheoutputsof
thetwofiltersarethensummedtogether.
The24dB/oct.routingmergesbothfilterstocreatea
single4‐pole,24dB/octavefilter(12dBforBandPass
andBandReject).IncomparisontoSingle,thisoption
producesasharperroll‐offbeyondthecutoff
frequency,aswellasa
slightlymoredelicate
resonance.Manyclassicanalogsynthsusedthis
generaltypeoffilter.
SerialandParallelRouting
Filter Types
Thisselectsthepartsofthesoundwhichwillbe
affectedbythefilter,asdescribedbelow.Withthe
SerialandParallelroutings,youcanindependentlyset
thetypesforFilterAandFilterB.
Thefilterswillproduceverydifferentresults
dependingontheselectedfiltertype.Theselections
will
changeslightlyaccordingtotheselectedFilter
Routing,toshowthecorrectcutoffslopeindBper
octave.
LowPass.Thiscutsoutthepartsofthesoundwhich
arehigherthanthecutofffrequency.LowPassisthe
mostcommontypeoffilter,andisusedtomakebright
timbres
sounddarker.
HighPass.Thiscutsoutthepartsofthesoundwhich
arelowerthanthecutofffrequency.Youcanusethisto
maketimbressoundthinnerormorebuzzy.
Filter A (Low Pass)Oscillator Filter B (High Pas
s)
Oscillator
Filter A (Low Pass)
Filter B (High Pass)

Korg Oasys Specifications

General

Type	Workstation
Timbrality	16 parts
Velocity Sensitivity	Yes
Aftertouch	Yes
RAM	1GB
Synthesis Types	HD-1, AL-1, CX-3, STR-1
Oscillators	Varies by synthesis type
LFO	Multiple LFOs per program
Filter	Varies by synthesis type
Effects	12 insert effects, 2 master effects
Sequencer	16-track MIDI
Sampling	Yes, with 16-bit/48kHz resolution
Display	10.4-inch color touch screen
Keyboard	88-key or 76-key weighted action
Storage	40GB internal hard drive
Connectivity	MIDI In/Out/Thru, USB, S/PDIF