Compensating For Time Code Offsets; Generating & Regenerating Time Code - DigiDesign SYNC HD Manual

Compensating for Time Code
Offsets
You can offset the display of incoming time
code in the Pro Tools application. This is useful
when you want to adjust the display of time
code to match the start time of the session (such
as with source material that starts at a different
time), or compensate for source material that is
consistently offset by a fixed number of frames
(such as with some color–corrected video mas-
ters).
Pro Tools provides five different types of Exter-
nal Time Code Offset settings. These offsets in-
clude:
• MMC (MIDI Machine Control)
• 9-Pin (Deck Control)
• Synchronization peripherals such as the
SYNC HD, SYNC I/O, or other peripherals
(such as MIDI interfaces that provide MIDI
Time Code).
• Sample Offset
Unique values can be defined for each of these
types of offsets, or you can link MMC, 9-Pin,
Sync, and Satellite to adjust in unison.
Positive and negative offset values can be en-
tered to offset Pro Tools time code display later
or earlier, respectively.
Offsets and SYNC Peripheral Time Code Display
The SYNC peripheral front panel display contin-
ues to display actual incoming time code, re-
gardless of any External Time Code Offsets set-
tings that are applied in Pro Tools.
To apply an offset to an external time code source:
In the External Time Code Offsets section of the
Session Setup window, enter a time in an offset
field.
To apply the same offset to external MMC, 9-Pin,
Sync, and Satellite time code sources:
In the Session Setup window, select Link to ap-
ply the same offset value to all devices.
Generating & Regenerating
Time Code
SYNC peripherals can generate LTC, VITC, and
MTC simultaneously, obtaining time addresses
from a variety of sources:
When the Positional Reference is LTC, VITC,
or Bi-Phase, the SYNC peripheral generates LTC,
VITC, and MTC simultaneously, based on the
time address of one of those sources.
When the Positional Reference is Serial Time
Code, you can set the SYNC peripheral to gener-
ate LTC.
Time code generated by SYNC peripherals
does not follow session Pull Up and Pull
Down settings.
Read/Regeneration Mode
In this mode, the SYNC peripheral regenerates
time code based on external positional reference
information (LTC or VITC time code, or a Bi-
Phase/Tach signal). Subject to certain condi-
tions, three types of time code (LTC, VITC, and
MTC) are simultaneously regenerated from the
selected positional reference.
Chapter 4: Using SYNC Peripherals 49