Avid Technology Pro Tools SYNC HD, Manual

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Pro Tools | SYNC HD Guide 8
Connecting Word Clock Devices
SYNC HD has Word Clock input and output ports,
which can be used simultaneously. Use Word
Clock when you want SYNC HD to lock to 1x
clock from DAT machines, DA-88s, and similar
digital devices.
HD interfaces each have their own Word Clock in-
puts, which provide additional clock options and
flexibility.
To input Word Clock to a SYNC HD:

Connect Word Clock from the master Word
clock signal or device to the SYNC HD Word
Clock In.
To supply Word Clock from a SYNC HD:

Connect the SYNC HD Word Clock Out to the
Word Clock input of a digital device.
Make sure the SYNC HD Word Clock Out port is
configured to 1x for Word Clock.
Word Clock contains no positional information. If
you want devices to play or record in sync, you’ll
still need to provide them with a positional refer-
ence.
Connecting AES/EBU Devices
To input AES/EBU clock reference to a SYNC HD:

Connect the device’s AES/EBU output to the
SYNC HD AES/EBU input.
To supply AES/EBU clock reference from a
SYNC HD:

Connect the SYNC HD AES/EBU output to the
AES/EBU reference input on a DAT machine or
other digital device. (AES/EBU clock does not
support 176.4 kHz or 192 kHz sample rates.)
Connecting MIDI Timecode
Devices
The SYNC HD MTC Out port supplies MIDI
timecode, derived from conversion (from LTC,
VITC or Bi-Phase) or from MTC generation, to
synchronize MTC-compatible consoles, sequenc-
ers, lighting systems, and other devices.
MIDI timecode from the MTC Out port always
matches the timecode address displayed on the
SYNC HD front panel. To supply MTC from the
SYNC HD to another MTC-compatible device,
connect the device as described below.
To connect an MTC-compatible device to receive
MTC from a SYNC HD:

Connect the SYNC HD MTC Out port to the
appropriate MIDI input on the device, using a
standard MIDI cable.
Pro Tools and MTC
Pro Tools receives MTC from the SYNC HD
through its connection to the SYNC HD Host Se-
rial port. This signal does not include standard
MIDI timecode, but is instead a high-quality, pro-
prietary timecode signal designed for Pro Tools. A
MIDI Interface is not required for Pro Tools to re-
ceive MTC.
MTC is output whenever the SYNC HD is gener-
ating timecode. This MTC output can be muted
when timecode (LTC) is idle. See “MTC Output
and Idle Muting” on page 42 for details.
SYNC HD can generate timecode to provide
positional reference to other devices. See
“Generating & Regenerating Timecode” on
page 37.