Yamaha FX900 - Manual (Page 24)

• WAH — Stereo Wah
This fully programmable stereo wah effect can be controlled by input signal level, an internal LFO, a foot controller, or MIDI control
change data.
TYP FRO GAI Q
РЕК 250 0 2.8
SEN CTR
5 AIJT
SPD LVL
7.5 0
TYP (Filter туре: РЕК. LPF. HPF. BPR
Selects the type of filter response used to produce the wah
effect — РЕК = peaking; LPF = low-pass filter; HPF = high-
pass filter; BPF = bandpass filter.
FRQ (Freauencv: 40Hz — 8 kHz)
Sets the basic frequency around which the wah filter sweep
will occur — i.e. the center or cutoff frequency of the selected
filter type.
GAIN (Gain:-18-+18 dB)
This parameter is only available when the "РЕК" filter type is
selected in the "TYP" parameter. It sets the gain of the filter
peak — minus values for a notch response and plus values
for a normal peak response.
Q ,(й.ца.Шу.Р gctpr; Q.50 —10)
When the TYP parameter, above, is set to "PEQ" or "BPF",
this parameter sets the bandwidth of the peak or passband.
When TYP is set to "LPF" or "HPF", the Q parameter controls
resonance (a peak at the filter cutoff frequency). Higher
values produce a narrower bandwidth or higher resonant
peak.
SEN (Sensitivity: 0-10)
Determines the sensitivity of the wah effect. Higher values
produce a broader frequency sweep.
LVL
CTR (Controller: LFO. INL. INR. FV1. FV2. MID. FC1. FC2)
Selects the control mode for the wah effect:
LFO — the FX900's internal low-frequency oscillator controls
the wah effect.
INL — the wah effect is controlled by the left-channel input
signal level. Higher input levels produce a broader sweep.
INL — the wah effect is controlled by the right-channel input
signal level. Higher input levels produce a broader sweep.
FV1 —An optional Yamaha FC7 Foot Controller plugged into
the rear-panel FOOT VOL 1 jack controls the wah effect.
FV2 — An optional Yamaha FC7 Foot Controller plugged into
the rear-panel FOOT VOL 2 jack controls the wah effect.
FC1 — A Yamaha FC7 Foot Controller plugged into the
FOOT CONTROL 1 jack of the optional FC900 Foot
Controller controls the wah effect.
FC2 — A Yamaha FC7 Foot Controller plugged into the
FOOT CONTROL 2 jack of the optional FC900 Foot
Controller controls the wah effect.
MID — MIDI control change "foot controller" data (control no.
4) controls the wah sweep.
SPD (Modulation Speed: 0.1Hz —10Hz)
Sets the speed of the internal low-frequency oscillator —
effective when the LFO control option is selected in the
"CTR" parameter, above.
LVL (Output Level: -30 — +6 dBY
Sets the output level of the WAH effect.
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