8

54 Chapter 2 Customizing Controller Assignments
Automation Group
Choosing the Automation Group class allows you to use an assignment to set an
automation group parameter.
When this class is chosen, a Group field appears below the Class menu. You can
determine the edited group by entering a number in the field. Entering a “0” sets this
parameter to the group selected for the Automation Group parameter (in the control
surface group parameters).
A Parameter menu also appears below the Group field, allowing you to choose the
automation group parameter for the assignment. For further information, see the
Group Settings section of the Logic Express 8 User Manual.
Input Message Section
The parameters in this section let you control different aspects of MIDI input.
MIDI Input Pop-up Menu
When you choose a MIDI input (port) from the menu, all assignments that use the
same input are changed accordingly. If the assignment belongs to a supported control
surface, the device’s MIDI Input also changes in the Setup window.
This makes it easy for you to create default assignments for a new control surface.
These new assignments can be moved to other Logic systems by copying your
com.apple.Logic.cs preferences file. Simply paste this preference file into the Preferences
folder of another Macintosh, open the Controller Assignments window in Expert view,
and change the MIDI Input parameter of one assignment (as applicable to the MIDI
setup of the computer).
Value Change Field
Shows incoming MIDI messages that cause a value change in the destination
parameter, and lets you edit these MIDI messages.
The Value Change field displays the message as a sequence of hexadecimal bytes. The
plain language meaning appears below the field. The placeholders for the variable part
of the message are:
 Lo7: Low 7 bits of the value (LSB or Least Significant Bits)
 Hi7: High 7 bits of the value (MSB or Most Significant Bits)
For messages containing only a Lo7 placeholder, the value is treated as 7-bit. For
messages containing both a Lo7 and Hi7 placeholder, the value is treated as 14-bit. The
order of Lo7 and Hi7 is honored, and there may be constant bytes in-between. This
allows you to define Control Change LSB and MSB portions. For example: B0 08 Hi7 B0
28 Lo7 indicates a 14-bit message.