Apple Logic Pro X - Manual (Page 598)

Chapter 19 Make global changes to a project 598
Control tempo changes with the tempo fader
When Advanced MIDI Options is selected in the Advanced preferences pane, you can
create a real-time tempo fader in the Environment window by choosing New > Fader > Specials
> Tempo Control. This fader can control the project tempo (using Meta event #100). There is no
need to connect this fader to anything, unless you want to record its output.
A tempo fader has a range of possible values from 50 to 177 bpm. External MIDI data can be
used to control it, with an input value of 0 resulting in a tempo of 50, and an input value of 127
resulting in a tempo of 177.
If you place a tempo fader between the Physical Input and Sequencer Input objects in the
Environment, you can:
•
Record tempo changes
•
Control the tempo with any desired MIDI event types
This way, new Tempo track data can be recorded intelligently. The original tempo data is only
erased in areas that actually contain tempo changes.
If a tempo fader is moved during playback or recording, all data defined in the Tempo List is
turned off, until you stop playback or recording.
Movements of a tempo fader are ignored when external SMPTE sync is active. A tempo fader can
therefore be used to deactivate the sync reference during playback or recording, if you wish.
For more information about create meta event faders in the Environment, see Meta event faders .
Note: The tempo fader’s inspector displays pitch bend events as the Input definition (by default).
This allows control of the project tempo with your keyboard’s pitch bend wheel.