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Connecting Pro Tools|HD to HDx
Pro Tools with HDx supports up to two HDx cards, each with
two 32-channel DigiLink connectors, for a total of 128 chan-
nels of input or output to your VENUE system.
Each HDx port is connected with a DigiLink cable (available
separately from Digidesign) to an HD Core, Process, or Accel
card in the Pro Tools computer or Expansion Chassis.
All DigiLink cables connecting the HDx cards to the
Pro Tools|HD cards must be the same length.
Connecting Pro Tools HD Cards to HDx
The HDx card ports can be connected to the Pro Tools HD
cards in any sequence, but if you are connecting an HD-series
audio interface to the system, it must be connected to the last
Pro Tools|HD card in the sequence (the HD card farthest away
from the HD Core card).
Basic System
The following is an example connection scheme for a single
HDx card and Pro Tools system with an HD Core card and one
additional card. See Figure 1 on page 9 for an example system
diagram.
Pro Tools HD Core card: HDx1 card port A
1
Pro Tools HD Process or Accel card #1: HDx1 card port B
2
Expanded System
The following is an example connection scheme for two HDx
cards and a Pro Tools system with an HD Core and 4 addi-
tional cards. See Figure 2 on page 10 for an example system di-
agram.
Pro Tools HD Core card: HDx1 card port A.
1
Pro Tools HD Process or Accel card #1: HDx1 card port B.
2
Pro Tools HD Process or Accel card #2: HDx2 card port A.
3
Pro Tools HD Process or Accel card #3: HDx2 card port B.
4
Pro Tools HD Process or Accel card #4: HD audio interface.
5
8
HDx TDM Option Guide
Using an HD Audio Interface with HDx
(Optional)
You can connect one HD audio interface (192 I/O, 192 Digital
I/O, 96 I/O, or 96i I/O) to the Pro Tools system to allow re-
mote monitoring of audio by the recording engineer, or re-
mote audio input to the Pro Tool system, such as with audi-
ence microphones in live performance.
Word Clock Connections
If a Pro Tools HD audio interface (192 I/O, 192 Digital I/O,
96 I/O, or 96i I/O) is connected to the system, a Word Clock
connection between the VENUE system and the audio inter-
face is required.
If no Pro Tools HD audio interface is used, a Word Clock con-
nection is not needed.
To connect Word Clock between the VENUE system and a
Pro Tools|HD peripheral:
Connect one end of a BNC cable to the Word Clock Out port
1
on the FOH Rack. (If a second FOH Snake card is present in the
FOH Rack, connect the cable to the Word Clock Out port on
the second FOH Snake card.)
Connect the other end of the BNC cable to the Loop Sync in
2
port on the HD audio interface.
Power Sequence
Whenever you are using a Pro Tools system with HDx, always
power up the system in the following sequence.
Power up the VENUE system and the Pro Tools system in the
following order:
Power up VENUE system components in the following or-
1
der:
• Main Unit and Sidecars, or Profile
• Mix Rack, or Stage Racks and FOH Rack.
Start up the Pro Tools computer.
2
Launch Pro Tools.
3
Power down the VENUE system and the Pro Tools system in the
following order:
Quit Pro Tools.
1
Shut down the Pro Tools computer.
2
Shut down the VENUE system in the following order:
3
• Mix Rack, or FOH Rack and Stage Rack
• Main Unit and Sidecars, or Profile
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