Specifications

MIDI Control Surfaces Guide78
Wheel Data
Wheel data is in the form of “2’s complement”
with the 6th bit as the sign bit. Positive numbers
are sent for clockwise rotation. These numbers
represent the wheel counts accumulated since
the last transmission (such as relative position
count), similar to what a computer mouse trans-
mits. The resolution is approximately 180
counts per revolution, and transmissions are
sent at about 10 milliseconds intervals when the
wheel is being turned.
Note that for certain switches, such as the
Mute switches, each “depressed” message
toggles the state of the switch on or off.
Table 2. Wheel Data
cc Name vv
00h Mute switch 1 00=release,
7Fh=depressed
01h-07h Mute switches 2-8 00=release,
7Fh=depressed
08h Mode switch 00=release,
7Fh=depressed
09h Shift switch 00=release,
7Fh=depressed
0Ah F1 switch 00=release,
7Fh=depressed
0Bh F2 switch 00=release,
7Fh=depressed
0Ch F3 switch 00=release,
7Fh=depressed
0Dh F4 switch 00=release,
7Fh=depressed
0Eh F5 switch 00=release,
7Fh=depressed
0Fh F6 switch 00=release,
7Fh=depressed
10h F7 switch 00=release,
7Fh=depressed
11h F8 switch 00=release,
7Fh=depressed
12h F9 switch 00=release,
7Fh=depressed
13h REW switch 00=release,
7Fh=depressed
14h FF switch 00=release,
7Fh=depressed
15h Stop switch 00=release,
7Fh=depressed
16h Play switch 00=release,
7Fh=depressed
17h Record switch 00=release,
7Fh=depressed
18h Left Wheel switch 00=release,
7Fh=depressed
19h Right Wheel switch 00=release,
7Fh=depressed
1Ah Up cursor switch 00=release,
7Fh=depressed
1Bh Down cursor
switch
00=release,
7Fh=depressed
1Ch Left cursor switch 00=release,
7Fh=depressed
1Dh Right cursor switch 00=release,
7Fh=depressed
1Eh Footswitch 00=release,
7Fh=depressed
40h Fader 1 Range 0 to 7Fh
41h-47h Faders 2-8 Range 0 to 7Fh
48h Boost/Cut Range 0 to 7Fh
49h Frequency Range 0 to 7Fh
4Ah Bandwidth Range 0 to 7Fh
4Bh Send 1 Range 0 to 7Fh
4Ch Send 2 Range 0 to 7Fh
4Dh Pan Range 0 to 7Fh
60h Whee 2s complement /7
bits data
Table 2. Wheel Data
cc Name vv