JLCooper MCS2 MIDI - Manual (Page 16)

16
Jog Mode:
There is no Jog mode specified in the MMC specifications.
Lacking this, the MCS
2
uses the same technique as used with
the Sony 9-pin equipment: wheel speed is translated into a
shuttle value which is sent every 100 msec or so. When
movement of wheel stops, a message with a zero value of
shuttle is sent out. A rotational speed of about 1/2 turn per
second results in a value of about 01 00 00, or normal play
speed.