JLCooper MCS2 MIDI - Manual (Page 15)

15
Wheel MMC Commands
There are two different MMC “modes” that the wheel may be
set to: Shuttle and Jog.
The MCS
2
powers-up in the Jog mode with the LED on.
At any time, the user may switch between Jog and Shuttle
mode by pressing the Jog button. This also toggles the state of
the Jog LED.
Shuttle Mode:
Standard MMC Shuttle commands are sent,
F0 7F 7F 06 47 03 aa bb cc F7, where aa bb cc are the
“Standard Speed” values as per the MMC specifications.
In the Shuttle mode, the position of the knob when the unit
enters the shuttle mode, or whenever a transport key is
pushed, is considered the ‘Zero’ position. Movement away
from this Zero position sends increasingly positive or negative
shuttle commands.
The minimum value is 00 10 00. At about 45˚ of movement, a
value of 01 00 00 (normal play speed) is sent out. At about 120˚
of movement, the value “max’s out” with a value of 07 00 00
(7 times play speed).
Continued movement sends no new MMC commands
(although controller commands continue to be sent.) If, for
example, the wheel is turned clockwise about 120˚, the
maximum value of 07 00 00 is reached. If the wheel is turned
farther, no new messages will be sent. Then, if the wheel is
turned back counter clockwise, a decreasing speed value will
be sent from that point. Thus, the Zero point will shift if the
wheel is turned past the “maximum” point.
At any time, pressing a transport key such as Stop will reset the
Shuttle value to zero.