10.6

Table Of Contents
1041Logic Pro User Guide
When Additional Audio Options is selected in Advanced preferences, the following is
available:
CoreAudio pop-up menu: Defines how your CoreAudio hardware is synchronized to an
external timecode transmitter.
MTC Continuous: Audio regions are started in sync, and the sample rate is
continuously regulated to match variations in the timecode transmitter signal. Even
very long audio regions stay in sync in this mode.
MTC Trigger + Auto Speed Detection: Similar to MTC Trigger (see below), but
the tempo of the timecode transmitter is constantly monitored while Logic Pro is
running. The next time you start Logic Pro, it uses an adapted sample rate. This
mode keeps long regions in better sync with the timecode transmitter, although not
as closely as MTC Continuous. It does, however, use a constant sample rate, which
isn’t affected by variations in the timecode transmitter signal.
MTC Trigger: Audio regions are started in sync, but are then played at a constant
sample rate, regardless of any variations in the timecode transmitter signal. Logic
Pro always uses the set nominal sample rate (44.1, 48, 88.2, 96, 192kHz). This mode
is suitable when it is vital to retain the absolute pitch of a recording. If the speed of
the timecode transmitter deviates from the nominal value, you may need to split long
audio regions into shorter sections.
External or Free: Logic Pro has no influence on the sample rate. The audio hardware
is responsible for ensuring that the position and sample rate of audio regions match.
This mode is advisable only if you’re sure the Word Clock and timecode transmitter
are running in sync—by using an external SMPTE or Word Clock synchronizer, for
example.
MIDI Synchronization settings in Logic Pro
MIDI Synchronization settings are only available when Show Advanced Tools is selected
in Advanced preferences.
You can use these settings to synchronize external devices that receive MIDI clock from
Logic Pro. You can configure MIDI clock synchronization settings independently for up to
10 external devices.