Roland SPD-S Owner's Manual page 106

Effect List
17: WAH
Produces a wah-wah effect.
Parameter Value Descriptions
Sens 0–127 Sensitivity of the wah-wah effect
Frequency 0–127 Pitch of the effected sound
Resonance 0–127 Degree of peculiarity of the wah-wah sound
In addition, if you press the PAGE buttons, "Knob," "Velo" and "Pedal" are displayed. You can then select the parameters to be
controlled with the EFFECTS CONTROL knob, the strength (velocity) used in hitting a playing surface, and the expression pedal.
Value Parameters controlled with Knob and Pedal
(See the table above for details.)
OFF —
SENS Sens
FREQUENCY Frequency
RESONANCE Resonance
PEDALWAH Frequency, Sens
Value Parameters controlled with Velo
(See the table above for details.)
OFF —
SENS Sens
FREQUENCY Frequency
RESONANCE Resonance
DYNAFREQ Frequency, Sens
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Descriptions
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The sensitivity is set to 0 (zero) and the pitch of tone is con-
trolled. It can be used like the pedal-based wah-wah effect.
Descriptions
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—
—
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The sensitivity is set to 0 (zero) and the pitch of tone is controlled.