Kawai CA901 Owner's Manual page 40

Adjustments & Settings
Dual mode advanced settings
When Dual playing mode is selected, the following settings can be changed.
Balance
This setting is used to adjust the volume balance between the Main and Sub sounds.
Drag the Balance slider
Octave Shift f f
This setting is used to lower/raise the pitch of the Sub Sound in octave steps.
Ta T T p the [–] and [+] buttons to change the octave value.
The octave value can be adjusted in increments of 1 octave within the range of -2~2.
Dynamics
This setting is used to adjust the dynamic sensitivity of the Sub Sound relative to the Main Sound.
Drag the Dynamics slider
Sound.
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right/left f f to increase the volume of the Main/Sub sounds.
right/left f f to increase/decrease the dynamic sensitivity of the Sub