User guide

672 Chapter 30 Advanced Tempo Operations
Switching Between Tempo Alternatives
The Alternative pop-up menu in the Tempo track allows you to switch between
different tempo maps. Put another way, you can create up to nine different tempo track
versions per project, and switch between them.
The original tempo track is automatically assigned to Alternative 1.
To create an alternate tempo map:
m Choose an unused number (2 through to 9), and create the desired tempo events.
This will be a blank tempo map, that contains one tempo event at the beginning of the
project.
To copy all tempo events from one tempo alternative to another:
m Hold Option, and choose the target tempo alternative from the pop-up menu.
This creates a replica tempo map, which can be adjusted slightly, allowing you to
experiment with small tempo variations, while retaining a fallback map.
The Relationship Between the Tempo and Beat Mapping Track
Actions performed in the Beat Mapping track result in changes to the Tempo track.
These include alterations to existing, or the creation of new, tempo change events.
Given this behavior, you should avoid making changes in the Tempo track after using
Beat Mapping functions. If you do so, the timing derived from the Beat Mapping
functions will be destroyed. For more information about the Beat Mapping track, see
Chapter 31, “Beat Mapping Regions,” on page 683.
Recording Tempo Changes
All tempo alterations made when Logic Express is in record mode are automatically
stored as tempo events on the Tempo track. These events can be created with external
MIDI controllers, the Environment tempo fader, or external synchronization signals. You
can edit recorded tempo events in the Tempo track or one of the tempo editors,
discussed later in this chapter.
To enable tempo change recording:
m Turn on the “Allow tempo change recording” checkbox in File > Project Settings >
Recording.