Roland SPD-S Owner's Manual page 112

Effect List
27: CENTRCANCEL (Center Canceller)
Eliminates sound located at the center, such as vocals.
Parameter Value
L-RBalance L63–R63
Low 0–127
High 0–127
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 —
L-RBALANCE L-RBalance
LOW Low
HIGH High
Value Parameters controlled with Velo (See the table above for details.)
OFF —
LOW Low
HIGH High
112
Descriptions
Control of the pan position at which the sound is cancelled
Amplification of low-frequency sound at the center, such as a bass sound
Amplification of high-frequency sound