Specifications

Appendix A: Using Other MIDI Control Surfaces 79
LED Data
All messages from the computer to the control
surface are transmitted using SysEx commands
as follows:
F0h 15h 15h 00h cc vv F7h
In this case, cc means LED number, and vv
means value.
For the 7-segment LEDs, Bit 0 means segment a,
Bit 1 means segment b, and so on. In each case,
a set bit turns the segment on.
Table 3. LED Data
cc Name vv
00h Mute LED 1 00=off, 7Fh=on
01h-07h Mute LEDs 2-8 00=off, 7Fh=on
08h Select Mode LED 00=off, 7Fh=on
09h Locate Mode LED 00=off, 7Fh=on
0Ah Mute Mode LED 00=off, 7Fh=on
0Bh Solo Mode LED 00=off, 7Fh=on
0Ch Down Null LED 00=off, 7Fh=on
0Dh Up Null LED 00=off, 7Fh=on
0Eh Left Wheel LED 00=off, 7Fh=on
0Fh Right Wheel LED 00=off, 7Fh=on
10h 1s 7-Segment Digit (see below)
11h 10s 7-Segment
Digit
(see below)
12h Record LED 00=off, 7Fh=on
13h Decimal pt to right
of 10s digit
00=off, 7Fh=on
14h Decimal pt to right
of 1s digit
00=off, 7Fh=on