Yamaha SY85 Owner's Manual page 100

RR (Release rate)
Vel (Velocity sensitivity)
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PERFORMANCE EDIT MODE /
Range: -63 ... +63
Controls: [CS6], [-1] [+1], Dial
Modifies the "RR" parameter of the voice amplitude EG — see page 60.
Plus (+) values produce a faster release rate while minus (-) values produce a
slower release rate.
No matter how much offset is applied, the minimum and maximum EG
release rates cannot be exceeded.
Range: -14 ... +14
Controls: [CS7], [-1] [+1], Dial
Modifies the amplitude EG velocity sensitivity setting (see page 63). Plus
"+" settings increase sensitivity while minus "-" settings reduce sensitivity.
No matter how much offset is applied, the minimum and maximum velocity
values cannot be exceeded.
QUICK EDIT