You hit it with your foot
When used with Alesis SpitFire amps, the expression pedal allows realtime control of parameters like volume, wah, or distortion. The Combo Pedal Board’s dual foot switches allow up/down scrolling through the 80 guitar tone presets. The switches can also be pressed simultaneously to activate the guitar tuner, and held down to mute output.
In addition, the Combo Pedal Board is compatible with amplifiers and keyboards from many other manufacturers. The unit features an all-metal chassis with non-skid footpad and feet. 4-meter cables are permanently attached to prevent misplacement and allow fast and easy setup.
The Combo Pedal Board will be available in Feb 2004 for $149