DigiDesign Digidesign Pro Tools 8.0, Reference Manual

Page: 120 / 1112

Pro Tools Reference Guide 102
Digidesign Synchronization Device
(Pro Tools HD Only)
The Digidesign Synchronization Device settings
let you configure a Digidesign synchronization
peripheral, such as the Digidesign SYNC HD or
SYNC I/O .
Enable SYNC Peripheral
When this option is selected, any connected
Digidesign Synchronization peripheral is en-
abled for use with Pro Tools.
Current Firmware Version
This displays the firmware version for the con-
nected Digidesign synchronization peripheral,
such as a SYNC HD.
VITC Insertion Enabled
When this option is selected, VITC is inserted
into the outgoing video signal—assuming that a
video signal is present at a Digidesign synchro-
nization peripheral video input, and that the
synchronization peripheral is in a valid mode
for inserting VITC.
Pitch Memory Enabled
When this option is selected, the Digidesign
synchronization peripheral will remain at a
pitch
(sample rate) that corresponds to the last known
incoming time code speed. When deselected,
the Synchronization peripheral reverts to the se-
lected sample rate. If Pitch Memory is disabled
and the selected external clock reference is not
available, then the synchronization peripheral
reverts to the nominal, selected internal sample
rate setting.
Idle MTC Enabled
When this option is selected, MTC is continu-
ously output. When not enabled, MTC output is
muted when playback is idle.
LTC Output Level
This setting adjusts the analog audio level of the
LTC output, from –24 dBu to +9 dBu.
VITC Read Lines
This setting determines which line pair of in-
coming video signal is used for the VITC source.
When set to Auto, the synchronization periph-
eral searches for the first valid line pair automat-
ically. Alternatively, this value can be set to spe-
cific VITC line pairs.
VITC Generate Lines
This setting determines the line pair of the out-
going video signal onto which the synchroniza-
tion peripheral inserts VITC. Normally, this
should be left at the default (and preferred) set-
ting of 14/16.
Bi-Phase/Tach Wiring
This setting lets you select from the following
options for Bi-Phase or Tach wiring:
• Bi-Phase: FWD = A leads B
• Bi-Phase: FWD = B leads A
• Tach:FWD = B is Low
• Tach: FWD = B is High
Bi-Phase/Tach Pulses/Frame (2–254)
There are several different standards for the
number of pulses-per-frame output by Bi-Phase
or Tach devices. You can set the Digidesign syn-
chronization peripheral to operate from 2 to 254
pulses per frame from Pro Tools. The setting
should match the PPF rate of the Bi-Phase/Tach
encoder on the external device.