User Guide

52 Chapter 2 Customizing Controller Assignments
Note: This only applies to the Channel Strip assignment class, and to parameters that
can be automated.
Value Section
The parameters in this section let you control different aspects of the values for
incoming MIDI messages.
Min and Max Fields
Enter an integer value to set the minimum and maximum range for incoming values
represented by Lo7 and Hi7. Typically, the minimum defaults to 0, and the maximum
defaults to 127. Some control surfaces (such as the CM Labs Motor Mix) may use the
same message—with different value ranges—for different controls. For more specific
information, refer to the documentation of your device.
Format Pop-up Menu
Choose the encoding format for negative values in the 7-bit portions sent over MIDI.
The choices are:
 Unsigned: No negative values are possible. The full 7 or 14-bit range is treated as a
positive number. The value range is 0 to 127 (7-bit) or 0 to 16383 (14-bit).
 2's complement: If the most significant bit is set, the value is negative. To obtain the
absolute value, invert all bits and add 1. The value range is from –128 (7-bit) to 127 or
–8192 to 8191 (14-bit).
 1's complement: If the most significant bit is set, the value is negative. To set the
absolute value, invert all bits. Note that this allows two possible encoding values for
zero. The value range is –127 to 127 (7-bit) or –8191 to 8191 (14-bit).
 Sign Magnitude: If the most significant bit is set, the value is negative. To set the
absolute value, clear the most significant bit. Note that this allows two possible
encoding values for zero. This results in a value range of –127 to 127 (7-bit) or –8191
to 8191 (14-bit).
The appropriate format for a device is usually specified in its documentation. If
unavailable, check the control surface manufacturer’s website or contact them for more
information.
Multiply Field
Enter a scaling value for incoming values. This is especially useful for button presses
that have a value of 1. As examples:
 To set the automation mode to Write, set Multiply to 4.00, and Mode to Direct.
 To decrement a parameter by 1 with a button press, set Multiply to –1.00, and Mode
to Relative.