Speedy Mouse Effect per Yamaha. I just tried it... worked for me. Eddie

To Hear Effect Only (no Lead) in 'Speedy Mouse' (Example):
1) Press the [VH TYPE SELECT] button.
2) Select the Vocal Harmony Type, 'SpdyMouse'.
3) Press the '8' [^] 'EDIT' toggle button to display the 'VOCAL HARMONY EDIT' page in the
screen.
4) Make the following changes:
HARM GENDER TYPE: AUTO
LEAD GENDER TYPE: OFF
LEAD GENDER DEPTH: -64
UPPER GNDR DEPTH: +63
LOWER GNDR DEPTH: +63
Saving the Edited Effect:
1) Press the [I] 'SAVE' button.
2) Rename the effect, if desired.
3) Press the '8' [^] 'OK' button.

Balance Setting:
1) Press the [MIC. SETTING] button.
2) Press the [J] button to select 'VOCAL HARMONY CONTROL'.
3) Use the '4' [v] toggle button to select 'LPSR2000 Owner's Manual, p. 130-132