Owner`s manual

Note: That if you select DSP Type 200, or "Thru" with the pull down
menu, there will either be no DSP, or if there is a DSP setting
preset in the Tone it will be used.
OTP Tone Selection
On the right side of the OTP Editor you can select the Main and Layer
Tones for right of the keyboard split (UP1 and UP2), the Main and Layer
Tones for left of the keyboard split (LOW1 and LOW2) and the Tone for
Auto Harmonize.