Yamaha Clavinova CLP-990 Owner's Manual page 36

Selecting and Playing Voices
Dual mode using voices in the same voice group
Procedure
1.
Select a voice group.
In normal play mode, press the desired MAIN voice group
button.
2.
Select a voice.
Use the A [–]/[+] buttons to select a voice.
3.
Select another voice.
Use the B [–]/[+] buttons to select another voice in the
same voice group.
To use the identical voices, press the B [–]/[+] buttons once. To use
different voices within the same voice group, press the B [–]/[+] but-
tons repeatedly.
A
C
4.
Exit Dual mode and return to normal play mode.
Press any MAIN voice group button.
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CLP-990
B
NO YES
D