Pro Tools Reference Guide794
SMPTE Trigger while Locking to an Unresolved
Source
SMPTE Trigger can be used with an optional
SYNC peripheral or equivalent device to resolve
Pro Tools recording and playback speed while
slaving to LTC. This enables long-term, accurate
synchronization by resolving to any variations
in incoming time code. SYNC peripherals also
support VITC and Bi-phase/Tach positional ref-
erence.
SYNC Peripheral Synchronization
Options
By adding a Digidesign SYNC peripheral to your
Pro Tools|HD system, you can use Pro Tools as
the master device in your synchronization
setup. All other devices are then slaved to
Pro Tools.
You can use Pro Tools in conjunction with a
SYNC peripheral to generate LTC, MIDI Time
Code, or MMC commands. When the SYNC pe-
ripheral is reading incoming SMPTE time code,
it regenerates the time code through the LTC or
MTC output connector. This signal can be
passed along to other slave devices.
MachineControl™
Digidesign SYNC peripherals also support
Digidesign MachineControl software, which
provides many specialized features for post-pro-
duction synchronization tasks including remote
track arming, VTR emulation, serial time code,
and other capabilities. (See the MachineControl
Guide for more information, or contact your
Digidesign dealer.)
Ext. Clock Output
Pro Tools can be used as the master device in
your synchronization setup, where all other de-
vices are then slaved to Pro Tools word clock
output.
With Pro Tools|HD systems, clock output can be
configured for 1x word clock, or 256x Slave
Clock for Digidesign Legacy I/Os (such as 888|24
I/O). See the Pro Tools|HD Getting Started Guide
for more information on clock output and Leg-
acy I/Os.
To set Ext. Clock Output:
1 Choose Setup > Hardware in Pro Tools.
2 Click the Ext. Clock Output pop-up menu and
select an available signal.
3 Click OK to close the Hardware Setup dialog
when you have finished.
For instructions on connecting an external
synchronization peripheral to your Pro Tools
system, refer to your Getting Started Guide.
If you are using a SYNC peripheral, refer to
its documentation.
If the Legacy Port is enabled (as opposed to
the Expansion Port) then the Ext. Clock
Output automatically switches to
Slave256x. To reset the Ext. Clock Output,
the Port Settings button must be set back to
Expansion and the Legacy I/O must be set to
No Interface. (To set a Legacy I/O to No In-
terface, select its name in the Peripherals
list, then choose No Interface from the
Interface pop-up menu.)
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