Specifications

Pro Tools Reference Guide550
SMPTE Trigger while Locking to an Unresolved
Source
(TDM Systems Only)
SMPTE Trigger can be used with the optional
SYNC I/O 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. The SYNC I/O also sup-
ports VITC and Bi-phase/Tach positional refer-
ence.
SYNC I/O Synchronization Options
By adding the SYNC I/O to your Pro Tools TDM
system, you can use Pro Tools as the master de-
vice in your synchronization setup. All other de-
vices are then slaved to Pro Tools.
You can use Pro Tools in conjunction with
SYNC I/O to generate LTC, MIDI Time Code, or
MMC commands. When SYNC I/O is reading
incoming SMPTE time code, it regenerates the
time code through the LTC or MTC output con-
nector. This signal can be passed along to other
slave devices.
MachineControl™
The SYNC I/O also supports Digidesign
MachineControl software, which provides
many specialized features for post-production
synchronization tasks including remote track
arming, VTR emulation, serial time code, and
other capabilities. (See the MachineControl Guide
for more information, or contact your Digide-
sign 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 Getting Started with HD Guide for
more information on clock output and Legacy
I/Os.
To set Ext. Clock Output:
1 Choose Setups > Hardware Setup 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 the Getting
Started Guide. If you are using SYNC I/O,
refer to your SYNC I/O 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.)