Yamaha QY70 Owner's Manual page 126

The "Curve" parameter sets the degree of positive or negative
"curvature" that will be applied to the continuous data: "-16" ... "00" ...
"+16".
Start point
After setting the parameters as required press [ENTER] to execute
the Create Continuous job. The metronome icon will appear on the display
while the data is being processed, then "Completed" will appear briefly
when the job is done. Press the [EXIT] key to return to the job list, or a
mode key to go directly to the selected mode.
124
T h e S o n g J o b s
Curve = +16 Curve = 0 (linear)
End point
Curve = -16
Clock
parameter