Yamaha MU90R Owner's Manual page 53

MULTI MODE
Reverb Send (RevSend)
NOTE
Keep in mind that the Reverb effect must be properly enabled and set for this parameter to
work as intended. (See page 101.)
Chorus Send (ChoSend)
NOTE
Keep in mind that the Chorus effect must be properly enabled and set for this parameter to
work as intended. (See page 103.)
Variation Send (VarSend)
4 4
This determines the level of the selected Part's Voice that is sent to the
Reverb effect. A value of 000 results in a completely "dry" Voice sound.
This determines the level of the selected Part's Voice that is sent to the
Chorus effect. A value of 000 results in a completely "dry" Voice sound
(no Chorus effect).
This determines whether the selected Part's Voice is sent to the Varia-
tion effect or not. A setting of "off" results in no Variation effect being
applied to the Voice.
Graphically indicates current Reverb Send setting.
Graphically indicates current Chorus Send setting.