Raising Vocal Designer's Pitch By One Octave (8Va) - Roland VP-550 Owner's Manual

Raising Vocal Designer's pitch by one octave
Here's how to raise Vocal Designer's pitch by one octave.
1.
Press the [8va] button; it will light, and the pitch of Vocal Designer
will rise one octave.
2.
Press the button once again; it will go dark, and Vocal Designer will
return to its original pitch.
"8va" is a symbol meaning "play one octave higher. "
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Unlike the OCTAVE [DOWN]/[UP] buttons, the [8va] button applies only to the Vocal Designer part.
Use this when you want to raise the Vocal Designer part one octave higher than the ensemble
part.
( 8va)