Korg KORG Pa50 user manual Random Filt

a: Frequency Bottom, a: Frequency Top

The sweep width and direction of the wah filter are deter- mined by the “Frequency Top” and “Frequency Bottom” 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: Sweep Mode

This parameter changes the wah control mode. Setting “Sweep 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 “Sweep Mode” is set to D-mod, you can control the filter directly via the modulation source in the same way as a wah pedal.

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

c: Envelope Sens (Envelope Sensitivity)

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.

c: Envelope Shape

This parameter determines the sweep curve for auto-wah.

Envelope Shape

Level

Envelope

value = 0...+100

value = 0...–100

Time

d: LFO Frequency [Hz], e: BPM/MIDI Sync

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

e: BPM, e: Base Note, e: Times

One cycle of LFO sweep is obtained by multiplying the length of a note ( … ) (selected for “Base Note”, in rela- tion 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.

Effects 181

Filter/Dynamic

010: Random Filt

(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 Waveform		Step-Tri, Random
	Selects LFO Waveform							☞
b	LFO Phase [degree]		–180...+180
	Sets the LFO phase difference between the left and right						☞
	LFO Frequency [Hz]		0.02...20.00Hz
	Sets the LFO speed						☞ ,
c	Src		Off...Tempo
	Selects the modulation source used for both LFO speed and step speed
	Amt	–20.00...+20.00Hz
	Sets the modulation amount of LFO speed
	LFO Step Freq (Frequency) [Hz]	0.05...50.00Hz
d	Sets the LFO step speed (speed that changes in steps)		☞ ,
	Amt	–50.00...+50.00Hz
	Sets the modulation amount of LFO step speed
	BPM/MIDI Sync			Off, On
	Switches between using the frequency of the LFO speed and using the
	tempo and notes	☞ Fx:009,
	BPM				MIDI, 40...240
e	Selects MIDI Clock and assigns tempo				☞ Fx:009, ☞
	Base Note		☞ Fx:009
	Selects the type of notes that specify the LFO speed
	Times		x1...x16
	Sets the number of notes that specify the LFO speed		☞ Fx:009
	Step Base Note		☞ ,
f	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						☞
g	Manual		0...100
	Sets the filter center frequency
	Depth		0...100
	Sets the modulation depth of filter center frequency
h	Src						Off...Tempo
	Selects the modulation source of filter modulation
	Amt					–100...+100
	Sets the modulation amount of filter modulation
i	Resonance		0...100
	Sets the resonance amount
	Wet/Dry	–Wet...–1:99, Dry, 1:99...Wet
	Table , “Sets the balance between the effect and dry sounds,” on page 175

☞,

j	Src	Off...Tempo
	Table , “Selects the modulation source of the effect balance,” on page 175
	Amt	–100...+100
	Table , “Sets the modulation amount of the effect bal-
	ance,” on page 175

a:LFO Waveform, c: LFO Frequency [Hz],

d:LFO Step Freq (Frequency) [Hz]

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