Apple Logic Pro 9 - Manual (Page 1192)

To avoid having to do this by trial and error
1 Open the Tempo List (see Using the Tempo List ).
2 Create a tempo event at the desired bar position.
3 Set a time position for this tempo event in the SMPTE Position column.
The preceding tempo event is automatically adjusted, to generate the correct bar and
time position for the inserted tempo event.
4 If you want to keep the same tempo for the following passage, delete the tempo event
you inserted.
MIDI Machine Control
MMC is a set of MIDI commands that Logic Pro uses to control the transport functions of
any MMC-capable tape machine. The recording process can also be controlled and
automated from Logic Pro via MMC. This tape machine then provides the SMPTE signal
that Logic Pro uses as a synchronization source (with Logic Pro as the slave).
You can control connected devices from Logic Pro by using the normal transport functions
(including direct positioning and cycle jumps). Don’t forget that Logic Pro needs to wait
for the connected device to finish rewinding or forwarding. If MIDI Machine Control is
enabled, dragging the playhead will send MMC Locate commands continuously, until
the mouse button is released.
To turn on MMC
Do one of the following:
µ
Control-click the Transport bar Sync button and choose the MIDI Machine Control (MMC)
setting in the shortcut menu.
µ
Choose File > Project Settings > Synchronization, and choose the Transmit MMC option
in the MIDI tab.
Logic Pro supports up to 64 MMC tracks, allowing devices such as the Alesis ADAT to be
operated via MIDI machine control.
1192 Chapter 40 Synchronizing Logic Pro