Yamaha TG500 Owner's Manual page 65

RR (Release rate)
Range: -63 ... +63
Modifies the "RR" parameter of the voice amplitude EG — see page 112.
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.
Vel (Velocity sensitivity)
Range: -14 ... +14
Modifies the amplitude EG velocity sensitivity setting (see page 117). 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.
PERFORMANCE EDIT MODE / 1: QUICK EDIT
1-1: VOICE AMPLITUDE EG OFFSET 53