JLCooper MCS3 USB - Manual (Page 30)

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Special Wheel Mode
The so called “Special Wheel Mode” is reserved for software
developers.
When the wheel is assigned to send a “Special” command, it
sends an invisible command code. The wheel will most likely
appear do nothing.
Some applications have been developed for enhanced MCS
3
support. The Special mode has been used by some developers
to implement features such as Audio and Video Jog and
Shuttle.
Some applications come with an MCS
3
Keyset which makes
use of the Special mode. For specific information, refer to the
documentation of the software that you are controlling if it
includes an MCS
3
Keyset.