Roland AT 5 用户手册

You can adjust the entire volume using an Expression Pedal. When you 
depress the Expression Pedal, the volume increases. The volume decreases 
as you tilt the pedal back.

fig.06-03

You can connect a damper pedal (sold separately) and use it to produce a 
lingering effect for the notes you play on the upper of the keyboard.

fig.06-04

While you continue depressing the damper pedal, notes will be sustained 
even if you release the keys.

Decrease
the volume

Increase
the volume

You can specify whether 
the Expression Pedal will 
or will not control the 
volume during the 
recording of music data 
(p. 60).

You can specify whether or 
not the Expression Pedal 
will affect the playback and 
what you play while 
Atelier music data is being 
played back (p. 61).