Special faders overview – Apple Logic Pro 8 User Manual
Page 928
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Chapter 39
Working in the Environment
The vector style fader replaces these with Vert and Horz definitions, which determine
the MIDI events that correspond to vertical and horizontal motion. If corresponding
MIDI events are received by the vector style fader, its crosshair display will update
accordingly.
4-Channel Vector Mode
If you set a vector fader’s Vert and Horz definitions to the same MIDI event (the same
MIDI controller and channel), the vector fader will send out four MIDI events each time
the crosshair is moved.
These will be the same MIDI event (a controller, for example), sent on four consecutive
MIDI channels, starting with the channel set in the Vert definition.
 Upper-left for the lowest channel (channel 3, for example)
 Upper-right (channel 4)
 Lower-left (channel 5)
 Lower-right (channel 6)
The values of these MIDI events corresponds to the proximity of the crosshair to the
vector fader’s four corners:
 In the center, all channels receive a value of 32.
 At the corners, the corresponding channel receives a value of 127 and all remaining
channels receive a value of 0 (if using the default range of 0 to 127).
If you alter the range, the center and corners will behave differently, with the four
values always totalling 125.
Special Faders Overview
The Environment provides a number of special fader objects that are purpose-built to
perform certain functions.
Switchers, Alias Assigners, and Meta Faders
These are two types of faders that do not generate MIDI events. They share the same
Output definition type, either: Switch (see “
depending on the current -1- value setting:
 If the -1- value is 48, the fader will be a cable switcher
 If the -1- value is 46, the fader will be an alias assigner (see “
 If the -1- value is any other value, the fader will send out meta messages (see “
” on page 930) of a type that corresponds to the -1- value.
To create a cable switcher, either:
m
Choose New > Fader > Specials > Cable Switcher.
m
Change an existing fader’s Output definition to Switch/Meta, and set its -1- value to 48.