Korg PA 900 Guide De L'utilisateur page 400

10: St. Wah/Auto Wah
(Stereo Wah/Auto Wah)
This stereo wah effect allows you to create sounds from vintage
wah pedal simulation to auto-wah simulation, and much
broader range settings.
Stereo In - Stereo Out
Left
Envelope Sens
+
Envelope Shape
Response
D -mod
LFO
Right
Frequency
0...100
Bottom
a
Frequency Top 0...100
Auto,
Sweep Mode D-mod,
LFO
b
Src Off...Tempo
Respon 0...100
Envelope Sens 0...100
c
Envelope
–100...+100
Shape
LFO Frequency
0.02...20.00
[Hz]
d Src Off...Tempo
–20.00...
Amt
+20.00
MIDI Sync Off, On
MIDI,
BPM 40.00...
e
300.00
Base Note r...w
Times x1...x32
Resonance 0...100
f
Low Pass Filter Off, On
Output Level 0...100
g Src Off...Tempo
Amt –100...+100
Dry, 1:99...99:1,
Wet/Dry
Wet
h
Src Off...Tempo
Amt –100...+100
FX Amt
Wah
Sweep Mode
Auto
D-mod
LFO
Wah
FX Amt
Sets the lower limit of the wah
center frequency
Sets the upper limit of the wah
center frequency
Selects the control from auto-wah,
modulation source, and LFO
Selects the modulation source for
the wah when Sweep Mode=D-mod
Sets the response speed when
Sweep Mode = Auto or D-mod
Sets the sensitivity of auto-wah
Sets the sweep curve of auto-wah
Sets the speed of the LFO
Selects a modulation source for LFO
speed
Sets the modulation amount of LFO
speed
When this is on, the LFO speed is set
by BPM, Base Note, and Times,
instead of Frequency
MIDI syncs to the system tempo; 40–
300 sets the tempo manually for this
individual effect
Selects the type of notes that
specify the LFO speed
Sets the number of notes that
specify the LFO speed
Sets the resonance amount
Switches the wah low pass filter on
and off
Sets the output level of the effect
sound
Selects the modulation source that
will control the effect output level
Sets the modulation amount of the
effect output level
Balance between the wet and dry
signal
Table , "Dynamic Modulation
sources, " on page 357
Amount of modulation source
a: Frequency Bottom
a: Frequency Top
The sweep width and direction of the wah filter are determined
by the "Frequency Top" and "Frequency Bottom" settings.
Frequency
Top=75
Wah
Bottom=25 Woo
Higher
Zero
Frequency
Wah
Top=75
Woo
Woo
Bottom=25
Envelope
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 fre-
quently 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
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.
Level
value = 0...+100
value = 0...–100
d: LFO Frequency [Hz]
e: MIDI Sync
When "MIDI/Tempo Sync"=Off, the LFO speed uses the LFO
Frequency parameter setting. When "MIDI/Tempo Sync"=On,
the LFO speed follows the "BPM", "Base Note", and "Times" set-
tings.
e: BPM
e: Base Note
e: Times
One cycle of LFO sweep is obtained by multiplying the length of
a note (r...w) (selected for "Base Note", 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.
Page 386
Sweep Mode=D-mod
Frequency
Bottom=60
Wah
Woo
Top=30
D -mod
D
Higher
Max Zero Max
Sweep Mode=Auto
Frequency
Wah Wah
Bottom=75
Envelope
Top=25
Woo
Envelope Time
Time
Envelope Shape
Envelope
Time
-mod