Roland A-49 - MIDI Keyboard Controller (White) - Manual (Page 24)

Performing
24
Using the Knobs to Modify the Sound
You can modify the sound by turning the [C1] [C2] knobs.
Knob Function
[C1] knob Transmits a Cutoff (CC#74) message.
[C2] knob Transmits a Resonance (CC#71) message.
* The effect that’s applied will depend on the sound module. For details, refer to the owner’s
manual of your sound module.
MEMO
You can change the functions that are assigned to the [C1] [C2] knobs. For details, refer to
“Assigning Functions to the Knobs, Buttons, and Jacks” (p. 30).