Apple Logic Express 8 - Manual (Page 988)

988 Chapter 39 Project Settings and Preferences
Sync Preferences
 All MIDI Output Delay field: Delays or advances the MIDI output for all ports, allowing
you to compensate for any timing differences between MIDI tracks and audio or
(software) instrument tracks.
 MIDI Clock: Allow Song Position Pointer while playing: Song Position Pointer data is not
normally sent while the sequencer is in play mode (this is in accordance with the
MIDI Standard). This option allows Logic Express to send SPP while the sequencer is
running. The advantage is that external devices can also follow Logic Express in Cycle
mode. If your external devices cannot process SPP, you should switch this option off.
If your devices can follow MTC (MIDI Time Code), you should leave this option
unchecked, and use the MTC functions of Logic Express.
 MTC Pickup Delay: This parameter should generally be set to zero, to ensure the
quickest possible pickup time while Logic Express is in MTC (MIDI Time Code) sync
mode. There are, however, some devices which seem to transmit imprecise MTC
commands when first started. As a result, synchronization may be unreliable, and
there could be an offset every time synchronization is established. In such situations,
you can set a delay time before incoming MTC is picked up. Essentially, Logic Express
will ignore the incoming MTC commands that occur in this time period. A (frame)
value of 25 to 30 corresponds to a delay of about a second, depending on the frame
rate. Use this parameter when synchronized to hard disk recorders and other devices,
if synchronization doesn’t appear to be consistent.
 Delay MTC Transmission by: This parameter allows you to delay the transmission of
MIDI time code. Negative values result in MTC being transmitted earlier. This facility
enables you to compensate for any reaction delays (to incoming MIDI time code) in
external MTC slave devices.
 MMC Uses: This menu allows you to choose between the following settings: