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Korg PS60 Bicycle User Manual

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Filter Pitch EG

35

Filter

Filteringcanmakesubtleordramaticchangestotheoscilla‐

tor’stimbre.Eachoscillatorhastwomultimoderesonantfil‐

ters,AandB,aswellasadedicatedfilterenvelopeand

keyboardtrackinggenerator.

Thesepagesletyoucontrolallaspectsofthefilters.Among

otherthings,youcan:

•Adjustbasicsettingsfo

reachoscillator ’sfilters,

includingrouting,modes,cutoff,resonance,etc.

•Setupfiltermodulation,includingkeyboardtracking,

thefilterenvelope,LFOmodulation,andAMScontrol.

Notethatwhenthe“OscillatorMode”issettoSingle,only

Oscillator1’sfiltersareactive;thepagesforOscillator2’sfil‐

terswillbegrayedout.

Filter1

ThispagecontainsallofthebasicsettingsforOscillator1’s

FilterAandFilterB.Forexample,youcan:

•Setupthefilterstoproduceasingle12dB/octfilter,dual

12dB/octfiltersineitherserialorparallelrouting,ora

single24dB/octfilter.

•Seteachofthetwofil

terstoLowPass,HighPass,Band

Pass,orBandRejectmodes.

Routing [Single, Serial, Parallel, 24dB(4Pole)]

Eachoscillatorhastwofilters,FilterAandFilterB.This

parametercontrolswhetheroneorbothofthefiltersare

used,andifbothareused,itcontrolshowtheyare con‐

nectedtoeachother.

Single:ThisusesonlyFilterAasasingle2‐pole,12dB/

octavefilter(6dBforBan

dPassandBandReject).Whenthis

optionisselected,thecontrolsforFilterBwillbegrayed

out.

Serial:This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:Th

isalsousesbothFilterAandFilterB.Theoscil‐

latorfeedsbothfiltersdirectly,andtheoutputsofthetwo

filtersarethensummedtogether.

24dB/oct:Thismergesbothfilterstocreateasingle4‐pole,

24dB/octavefilter(12dB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deli‐

cateresonance.Manyclassicanalogsynthsusedthisgeneral

typeoffilter.

When24dB/octisselected,onlythecontrolsforFilterAare

active;thecontrolsforFilterBwillbegray

edout.

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