Kurzweil Forte Getting Started Manual page 9

The Rear Panel
The Pedal Jacks
The CC1 (Volume) and CC2 Jacks
Use the CC pedal jacks to connect continuous control (or CC) pedals. A CC pedal is a physical
controller typically used to control multi-state (i.e., "continuous") parameters such as volume
or wah.
The Kurzweil CC-1 continuous control pedal will work best with Forte, but it is also possible
to use some third-party continuous control pedals designed for synthesizers.
NOTE : Only CC pedals should be connected to the CC pedal input.
GS-7