Apple Logic Pro 7.2 - Manual (Page 243)

Appendix
B
Logic
Control—MIDI
Implementation 243
V-Pots
Received: None
Transmitted: B0,
1i,
XX V-POT s
turned
by
user
i V-POT
ID
(00–07)
XX delta
value
in
the
form
of
(0
s
v
v
v
v
v
v)
s
direction
bit:
0
=
clockwise,
1
=
counter
clockwise
vv number
of
ticks
Examples:
Â
B0,
10,
01
=
V-POT
Ch.
1
is
being
turned
clockwise
by
one
tick.
 B0,
17,
47
=
V-POT
Ch.
8
is
being
turned
counter-clockwise
by
7
ticks.
V-Pot
LED
ring
Received: B0,
3i,
XX Set
LED
ring
display
Transmitted: None
i V-POT
number
(0
thru
7)
XX V-POT
display
control
byte
in
the
form
of
(0
p
x
x
v
v
v
v):
p
V-POT
display
center
LED
state
(1
=
on,
0
=
off )
xx V-POT
mode
(00
thru
03;
see
diagrams
below)
vv V-POT
display
position
value
00
=
all
LEDs
in
ring
off;
01
thru
0B
see
diagrams
below
Example:
Â
B0,
31,
06
=
V-POT
2
display
shows
LEDs
at
position
6.
Note:
In
any
V-POT
display
mode,
a
received
LED
position
value
of
00
will
turn
off
all
of
the
V-POT
LEDs.