Roland JV-880 Owner's Manual page 144

Preview Function
Ths sound
of
ths Rhythrn
Tons
(sssionsd
to
ths indicstsd nots
nuinbsr
in
ths displsy)
can
be heard by
pressing the
VOLUME
knob.
VOLUME
PRE
FiSH)
*
The
pitch of
the
sound
is
not
changed.