Korg Electric Keyboard manual 10 St.Rndm Filter, 169, Stereo Random Filter

a: FreqBottm, a: FreqTop

The sweep width and direction of the wah filter are determined by the “FreqBottm” and “FreqTop” settings.

Frequency		Frequency		Sweep Mode=D-mod
Top=75		Wah	Higher
	Higher	Bottom=60
			Wah
				Woo
Bottom=25	Woo	Top=30
	Higher	D-mod	Higher	D-mod
	Zero	Max	Zero	Max

Frequency				Frequency			Sweep Mode=Auto
		Wah				Wah		Wah
Top=75				Bottom=75
	Higher				Higher			Envelope
Bottom=25	Woo		Woo
				Top=25			Woo
		Envelope	Time				Envelope	Time

b: Swp Mode

This parameter changes the wah control mode. Setting “Swp Mode” to Auto will select an auto-wah that sweeps according to envelope changes in the input signal level. Auto-wah is frequently used for funk guitar parts and clav sounds.

When “Swp Mode” is set to Dmod, you can control the filter directly via the modulation source in the same way as a wah pedal.

When “Swp Mode” is set to LFO, the effect uses LFO to sweep in cycle.

d: Envelope Sens

This parameter sets the sensitivity of auto-wah. Increase the value if the input signal is too low to sweep. Reduce the value if the input signal is so high that the filter is stopped temporarily.

e: Envelope Shape

This parameter determines the sweep curve for auto-wah.

Envelope Shape

Level

Envelope

value = 0...+100

value = 0...–100

Time

f: lfoF, g: BPM/MIDI Sync

When “BPM/MIDI Sync”=Off, the LFO speed uses the lfoF parameter setting. When “BPM/MIDI Sync”=On, the LFO speed follows the “BPM”, “Base”, and “Times” settings.

g: BPM, g: Base, g: Times

One cycle of LFO sweep is obtained by multiplying the length of a note ( … ) (selected for “Base”, in relation to the tempo specified in (“BPM”, or the MIDI Clock tempo if “BPM” is set to MIDI) by the number specified in the Times parameter.

10: St.Rndm Filter

(Stereo Random Filter)

This stereo band pass filter uses a step-shape waveform and random LFO for modulation. You can create a special effect from filter oscillation.

Stereo In - Stereo Out

Left

Wet / Dry

Filter

Filter

Right

Wet / Dry

LFO Phase

LFO: Step-Tri/Random

a	LFO Wave (LFO Waveform)	Step-Tri, Random
	Selects LFO Waveform			☞
b	LFO Phase	–180...+180deg
	Sets the LFO phase difference between the left and right			☞
	Freq (LFO Frequency)	0.02...20.00Hz
	Sets the LFO speed		☞ ,
	(Source)		Off...Tempo

cSelects the modulation source used for both LFO speed and step speed

	(Amount)	–20.00...+20.00Hz
	Sets the modulation amount of LFO speed
	Step (LFO Step Frequency)	0.05...50.00Hz
d	Sets the LFO step speed (speed that changes in steps)		☞ ,
	(Amount)	–50.00...+50.00Hz
	Sets the modulation amount of LFO step speed
	Manual		0...100
e	Sets the filter center frequency
	Resonance		0...100
	Sets the resonance amount
	BPM/MIDI Sync		Off, On
	Switches between using the frequency of the LFO speed and using
	the tempo and notes	☞ Fx:09,
	BPM	MIDI, 40...240
f	Selects MIDI Clock and assigns tempo	☞ Fx:09, ☞
	Base (Base Note)		☞ Fx:09
	Selects the type of notes that specify the LFO speed
	Times		x1...x16
	Sets the number of notes that specify the LFO speed		☞ Fx:09
	StepBase (Step Base Note)		☞ ,
g	Selects the type of notes to specify the LFO step speed
	Times		x1...x32
	Sets the number of notes to specify the LFO step speed			☞
	Depth		0...100
	Sets the modulation depth of filter center frequency
	(Source)		Off...Tempo

hSelects the modulation source of filter modula- tion

	(Amount)		–100...+100
	Sets the modulation amount of filter modulation
	W/D (Wet/Dly)	–Wet...–1:99, Dry, 1:99...Wet
	Sets the balance between the effect and dry sounds		☞ ,
i	(Source)		Off...Tempo
	Selects the modulation source of the effect balance
	(Amount)		–100...+100
	Sets the modulation amount of the effect balance

a: LFO Wave, c: Freq, d: Step

When “LFO Wave” is set to Step-Tri, LFO is a step-shape, triangle waveform. The “Freq” parameter sets the original triangle wave- form speed. Changing the “Step” parameter enables you to adjust the width of the steps.

Effect

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