10.6

1042Logic Pro User Guide
• Destination pop-up menu: Sets the MIDI output port that receives MIDI clock signal.
Select “All” to use the same configuration for every MIDI output port.
• Clock checkbox: Activates MIDI clock transmission for the MIDI output port shown in the
Destination field of that row.
MIDI clock can easily be sent with other normal MIDI events (notes and controllers, for
example). When using multi-port MIDI interfaces (such as the Unitor8), better timing is
achieved by sending MIDI Clock to All ports, rather than to several individual ports.
If MIDI clock is transmitted to all ports, the events are only sent once from the computer
to the interface. If you address individual ports, one event needs to be sent for each
port, placing a higher strain on the bandwidth of all ports.
• Delay [ms] field: Use to delay the transmission of MIDI clock signals for the MIDI output
port of that row. Negative values mean that the MIDI clock signal is transmitted earlier.
This allows you to compensate for any reaction delays in external devices receiving MIDI
clock.
• PDC checkbox: Activates plug-in delay compensation for the MIDI output port shown
in the Destination field of that row. This compensates for delays that can be introduced
when using software plug-ins.
• MTC checkbox: Activates the transmission of MIDI timecode for the MIDI output port
shown in the Destination field of that row.
Note: If you can avoid it, you shouldn’t send MTC to all ports, as it’s very data intensive.
If possible, use a MIDI port that isn’t being used for anything else.
• MMC checkbox: Activates transmission of MIDI Machine Control for the MIDI output port
shown in the Destination field of that row. These commands are then sent whenever you
operate the transport functions (Start, Stop, Rewind, and so on) of Logic Pro.
Note: MMC will only be sent to the MIDI output destination if the Transmit MIDI Machine
Control (MMC) checkbox is selected.
MMC is normally used when Logic Pro is receiving an external sync signal (for example,
MTC or MIDI clock) from an external device (such as an ADAT), and you want to use
Logic Pro to control the external device’s transport functions. Logic Pro therefore
transmits MMC and receives MTC simultaneously. If you want to use the transport
controls of the external device, you don’t need to transmit MMC. In this situation, Logic
Pro only receives MTC from the transmitting device. You can also use MMC to record-
enable tracks on the MMC receiver device.
• Clock Mode pop-up menu: Determines the MIDI clock transmission mode for
synchronized MIDI devices.
• Pattern - Quantized clock start based on pattern length: Sends a Start command
to begin sequencer playback from the beginning of the pattern. The length of the
pattern must be set in the “Clock Start: with a pattern length of ____ Bar(s)” field.
• Song - SPP at Play Start and Stop/SPP/Continue at Cycle Jump: Sends a Start
command if playback begins at the start of your song. Otherwise, a Song Position
Pointer and a Continue command are sent to begin sequencer playback.
• Song - SPP at Play Start and Cycle Jump: Sends a Song Position Pointer command
when you start playback and every time Cycle mode repeats.
• Song - SPP at Play Start only: Sends a Song Position Pointer command only when
you begin initial playback.