Apple Logic Pro X - Manual (Page 842)

Chapter 24 Video and synchronization 842
MIDI Machine Control
MMC (MIDI Machine Control) is a set of MIDI commands that Logic Pro X uses to control the
transport functions of any MMC-capable tape machine. The recording process can also be
controlled and automated from Logic Pro X via MMC.
The tape machine provides a SMPTE signal that Logic Pro X uses as a synchronization source—
with Logic Pro X as the slave.
You control connected devices from Logic Pro X by using the control bar and navigation
functions, including direct positioning and cycle jumps. Dragging the playhead sends a
continuous stream of MMC Locate commands until you release the mouse button.
Important: Logic Pro X needs to wait for the connected device to finish rewinding or forwarding.
Turn on MMC
Do one of the following:
m Control-click the control bar Sync button, then choose the MIDI Machine Control (MMC) setting
in the shortcut menu.
m Choose File > Project Settings > Synchronization, then select the Transmit MMC checkbox in the
MIDI tab.
Set up a MMC tape machine for recording in Logic Pro X
Logic Pro X supports up to 64 MMC tracks, allowing devices such as the ADAT to be operated
with MIDI Machine Control.
Each track can act as a tape control track.
1 Create an instrument track.
2 Option-click the instrument icon in the Track inspector, then select the MMC icon from the
Others category.
The MMC icon is the only icon that actually affects the way a track behaves. All other icons are
purely graphical in nature.
You only need to create one instrument with the MMC icon. This instrument can be assigned to
as many tracks as required for control of (each track on) your external recorder.
Tip: It is recommended that you group tape control tracks in a folder. Tape control tracks must
be placed at the top of the track list. If you pack tape control tracks into a folder, this folder must
be the top track in the list.