Roland JV-80 Owner's Manual page 125

2.Performanco
Edit
I
TX
ZONE
-:Ar
Since
program change number, volume
and
pan
data are transmitted
over
MIDI when
the
Performance
is
called up,
you
can effectively
use
the
connected
external
sound
sources to
provide
extra Parts
of a
Performance from
theJV-80.
"A"
Within
the transmit zones,
you
can use the
transmit SWitCti
to turn off the
unneccessary zones.
By
doing
so,
the
performance
data
of
the
JV-80
is
not transmitted
over
MIDI.
125