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616 Chapter 19 Synchronization
Positioning Bars to Frames
If you want a particular bar in the song to coincide with a specific SMPTE time, you
need to alter the tempo of the preceding passage.
The following procedure will save you from having to do this by trial and error:
1 Open the Tempo List (see “Tempo List Editor” on page 598).
2 Create a tempo event at the desired bar position.
3 Set the desired 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 You can then delete the tempo event you inserted, if you want to keep the same
tempo for the following passage.
MIDI Machine Control
MMC is a set of MIDI commands that Logic uses to control the transport functions of
any MMC-capable tape machine. The recording process can also be controlled and
automated from Logic via MMC. This tape machine then provides the SMPTE signal that
Logic uses as a synchronization source (with Logic as the slave).
You can control connected devices from Logic by using the normal transport functions
(including direct positioning and cycle jumps). Don’t forget that Logic needs to wait for
the connected device to finish rewinding or forwarding. If MIDI Machine Control is
enabled, dragging the song position line will send “MMC Locate” commands
continuously, until the mouse button is released.
Switching on MMC
Activate MIDI Machine Control from the Sync button’s pull-down menu. You can also
temporarily switch the function off from here, allowing quick edits to be made.
This option can also be accessed by selecting Song Settings > MIDI.
Record Functions
Logic supports up to 64 MMC tracks, enabling the operation of devices such as the
Alesis ADAT via MIDI machine control.
Each Arrange track can act as a tape (control) track, by selecting an instrument with the
“tape deck” icon (#305).