Avid Technology Pro Tools SYNC X - Page 38

Chapter 6: Using Pro Tools | Sync X 30
Generator Reference Rules
If the Clock Reference Source is set to Internal, Internal with VSO, LTC, Pilot Tone, Bi-Phase, AES3, AES3id, 10 MHz, or
Word Clock, then the timecode generator locks to the selected clock reference.
If the
Clock Reference Source is set to Video Reference, the timecode generator references the signal input on the VIDEO REF
IN
BNC port.
Frame Rate Restrictions with Video Reference
If the Clock Reference Source is set to Video Reference, Pro Tools is restricted to generating timecode at the incoming video
frame rate.
In cases where the frame rate of the incoming video reference format exceeds 30 FPS, the generated timecode will be at one half
the frame fate of the video format. Additionally, if the high-rate video format is interlaced (for example, 1080i/59.94), the generated
timecode will be aligned with the odd field of the video reference.
Regenerating LTC
Sync X regenerates LTC whenever the external Positional Reference is moving at normal, 1x forward speed (+/– 8%).
Ensure that LTC connections are correctly made as outlined in Connecting LTC.
If you need to adjust the level of the LTC output signal from Sync X, see Adjusting LTC Output Level.
To regenerate LTC:
 In the Pro Tools Session Setup window, select the desired external Positional Reference.
Sync X regenerates LTC as soon as it receives a valid Positional Reference signal.
Generating LTC
Sync X can generate LTC using either an external or internal Clock Reference. Make sure LTC is correctly routed and that all your
other gear is properly configured before you begin. If necessary, adjust the input level for the destination device.
To generate LTC using Pro Tools:
1 In the Pro Tools Session Setup window, select the desired Clock Reference Source.
2 In Synchronization view in the Edit or Transport window, enable GEN LTC.
3 Start Pro Tools recording or playback. Pro Tools commands Sync X to begin generating LTC with time addresses synchronized
to the session time line.
Adjusting LTC Output Level
To adjust the LTC Output Level:
1 Choose Setup > Peripherals.
2 Click Synchronization.
3 Select the desired LTC Output Level (from –24 dBu to +9 dBu in 3 dB increments).
4 Click OK.
Generating MTC
MTC (MIDI Time Code) is a serial digital signal. It is an inaudible type of LTC that can be used by various MIDI devices. MTC
is available from the MIDI Out connector on the Sync X MIDI I/O breakout cable. Sync X always and only generates MTC when
generating LTC.
For more information on LTC, see LTC Signals.