Specifications
Pro Tools Reference Guide448
To set up a digital send to an external device from
a Digi 002, Digi 002 Rack, or Digi 001 system:
1 Choose Setups > Playback Engine and choose
the peripheral.
2 Do one of the following:
• If the external device is connected to the
S/PDIF RCA jacks, deselect S/PDIF Mirror-
ing. (When S/PDIF Mirroring is on, digital
output at the S/PDIF RCA jacks exactly mir-
rors the output of analog Channels 1–2.)
• If the external device is connected to the
Optical ports, choose a format (most likely
S/PDIF for an effects device) from the Opti-
cal Format pop-up menu.
3 Choose Internal from the Clock Source pop-
up menu.
4 Click OK.
5 Optionally, configure the I/O Setup dialog
with new path names for effects routing.
Using External Clock Sources
All Pro Tools systems can synchronize to an ex-
ternal clock source. Options for external clock
vary according to the type of Pro Tools system
you are using.
TDM Systems
Pro Tools|HD systems can receive external clock
through any of the digital inputs on any HD-se-
ries I/O (including AES/EBU, S/PDIF, and Opti-
cal).
With Pro Tools|24 MIX-series systems, or if an
expanded Pro Tools|HD system includes Legacy
interfaces (such as the 888|24 I/O), connect to
the digital input on Channels 1–2 of the Legacy
audio interface in order to clock from them. Leg-
acy I/Os only support 44.1 kHz and 48 kHz sam-
ple rates.
To select an external clock source for a TDM
system:
1 Choose Setups > Hardware Setup.
2 Select the appropriate HD I/O in order to dis-
play its settings in the Main page.
3 If necessary, enable the appropriate Digital
Format (if you have not already done so, accord-
ing to the instructions in your Getting Started
Guide or I/O Guide).
4 Set the Clock Source (Pro Tools 5.3 and
higher) or Sync Mode (Pro Tools 5.2 and lower)
to match the type of input.
5 Configure input routing of the digital source,
using the Input and Output pop-up menus, if
necessary.
If you set the Optical Format to S/PDIF,
Pro Tools will watch the Optical port for
any audio input, and ignore any audio in-
put on the S/PDIF RCA jacks.
To determine correct card order and audio
interface connections for TDM systems, re-
fer to the Getting Started Guide that came
with your system.