Meta event faders
Meta faders generate special meta events, which are used to control certain Logic Pro functions, but have no MIDI meaning, and are never sent to the MIDI output.
In some cases—Go to Screenset, Go to Project, and so on—you don’t need to cable meta faders into another object for them to work. You can use cabling to process meta events in the Environment, and alter their effect.
However in the majority of cases—Set fader range minimum, Bang!, Set transformer operation minimum, and so on—the meta fader must be cabled to the object being affected.
The following is a summary of the currently implemented meta events that can be generated by faders:
Go to Screenset
Go to Project
Go to Marker
Set fader range minimum
Set fader range maximum
Set the fader value without sending
Bang! Causes the fader to resend its current value. The bang data value can be used to make the fader increment-without-rollover (127), decrement-without-rollover (125), increment-with-rollover (123) or decrement-with-rollover (121). Use values one less than those shown to have the bang passed through to all connected faders.
Set transformer map value for the currently selected map position
Select transformer map position
Set transformer condition maximum (bottom) parameter, if any. (This applies to all conditions not set to All.)
Set transformer condition minimum (top) parameter, if any. (This applies to all conditions not set to All.)
Set transformer operation maximum (bottom) parameter, if any. (This applies to all operations not set to Thru.)
Set transformer operation minimum (top) parameter, if any. (This applies to all operations not set to Thru.)
For more information about meta events 122 to 127, see Use meta events to control condition and operation values.