Specifications

Chapter 4: Configuring Your Pro Tools System 45
To change the default Sample Rate:
1 Choose Setup > Hardware.
2 Choose the sample rate from the Sample Rate
pop-up menu.
3 Click OK.
High Sample Rates and Expanded Systems
With 176.4 kHz and 192 kHz sample rates, as
many as four Pro Tools|HD cards can be used.
Any additional cards (up the total system maxi-
mum of seven cards) will switch to Inactive
mode. The cards and any attached peripherals
will become active again when the sample rate is
set to 96 kHz or lower. See the Pro Tools Ex-
panded Systems Guide for more information.
Clock Source
The Pro Tools Hardware Setup dialog lets you se-
lect the Clock Source for the system.
Internal If you are recording an analog signal di-
rectly into Pro Tools, you will usually use the
Pro Tools Internal clock source.
External If you are transferring material into
Pro Tools from an external digital device, or if
you utilize a common house clock signal, you
will synchronize Pro Tools to that digital device
or common signal. Depending on your audio in-
terface, external options can include AES/EBU
[Encl], S/PDIF, Optical [Encl], AES/EBU 1–8,
TDIF, ADAT, and Word Clock. For details, refer
to the Pro Tools Reference Guide or the guide for
your audio interface.
To select the Clock Source:
1 Choose Setup > Hardware.
2 Choose the clock source from the Clock
Source pop-up menu.
3 Click OK.
Configuring Audio Interfaces
Pro Tools|HD audio interfaces support 16 chan-
nels of simultaneous I/O and multiple I/O for-
mats (including analog, AES/EBU, ADAT Opti-
cal, S/PDIF, and TDIF).
The Main page of the Hardware Setup dialog is
where you define which physical inputs and
outputs on your audio interface are routed to
available inputs and outputs in Pro Tools. You
can think of this window as a patchbay that al-
lows you to route any of the inputs or outputs
on your Pro Tools|HD audio interfaces to chan-
nel assignments in the Pro Tools mixer.
Hardware Setup dialog for 192 I/O, Main page
Your digital input device must be connected
and powered on for Pro Tools to synchro-
nize to it. If your input device is not powered
on, leave the Clock Source set to Internal.
Hardware Setup dialog for 192 I/O, Main page