Setup guide
Pro Tools|HD Setup Guide30
To connect Pro Tools|HD audio interfaces:
1 If you are using a single 192 I/O, 
192 Digital I/O, 96 I/O, or 96i I/O, connect its 
Primary Port to the Accel Core (for PCIe) or HD 
Core (For PCI) card with the DigiLink cable pro-
vided with the card. You must attach at least one 
192 I/O, 192 Digital I/O, 96 I/O, or 96i I/O to 
your system in order for Pro Tools to launch.
2 Connect additional Pro Tools|HD audio inter-
faces to subsequent Digidesign audio cards, or 
daisy-chain the interfaces (by connecting the 
Primary Port of the secondary interface to the 
Expansion Port of the primary interface).
If you are connecting both 192 I/O (or 
192 Digital I/O) and 96 I/O audio interfaces to 
your system, connect the 192 I/O (or 
192 Digital I/O) to your Accel Core (for PCIe) or 
HD Core (for PCI) card, followed by any addi-
tional 192 I/O (or 192 Digital I/O) interfaces 
connected to subsequent cards. Then connect 
96 I/O interfaces to subsequent cards, or to 
other interfaces, then connect 96i I/O inter-
faces.
You can also connect a single Pro Tools|HD in-
terface to each Pro Tools|HD card in your system 
using the provided DigiLink cables. (However, 
there is no advantage to this configuration over 
daisy-chaining interfaces.)
Connecting Loop Sync
If you are using two or more Pro Tools|HD audio 
interfaces or a SYNC peripheral, Loop Sync must 
be connected to maintain proper clock among 
the devices.
To make Loop Sync connections:
1 Connect the Loop Sync Out of each interface 
to the Loop Sync In of the next interface with 
the BNC cables included in your I/O packaging. 
2 Connect the Loop Sync Out of the last inter-
face to the Loop Sync In of the primary interface 
or SYNC peripheral.
Connecting Legacy I/Os
Each 192 I/O, 192 Digital I/O, and 96 I/O can 
support 16 channels of audio to and from 
Digidesign Legacy I/Os. (The 96i I/O does not 
support Legacy I/O.) Legacy I/Os include the 
888|24 I/O, 882|20 I/O, 1622 I/O, and the 24-bit 
ADAT Bridge I/O
™
If you have at least one 192 I/O or 
192 Digital I/O in your system configura-
tion, it must be connected to the Accel Core 
(for PCIe) or HD Core (for PCI) card as the 
primary interface.
The 96i I/O does not support Legacy I/O.
The original 888 I/O and 882 I/O interfaces 
are not supported with Pro Tools|HD.










