User guide

Chapter 6: Configuring Your Pro Tools System 53
3 Click the Main tab.
4 From the Clock Source pop-up menu, select
the appropriate clock source for the interface.
In many cases, you will use Internal. The other
choices are for resolving Pro Tools to external
clock sources. Depending on your audio inter-
face, Clock Source options can include: AES/EBU
[Encl], S/PDIF, Optical [Encl], AES/EBU 1–8, TDIF,
ADAT, and Word Clock (optional Word Clock
rates are available when operating at higher
sample rates).
5 If you want to send clock output to other de-
vices attached to the audio interface, select the
appropriate output from the Ext. Clock Output
pop-up menu.
If the Legacy I/O Port is enabled (and not the
Expansion I/O Port) then the Ext. Clock Output
automatically switches to Slave Clock (256x sam-
ple rate). To reset the Ext. Clock Output to Word
Clock, change the Port Settings back to
Expansion I/O, then select the Legacy I/O in the
Peripherals list, and set it to No Interface in the
Interface pop-up menu. (The HD OMNI,
HD I/O, HD MADI, and 96i I/O do not support
Legacy I/O.)
6 Select which digital I/O port on your audio in-
terface enclosure is active by selecting an option
under Digital Format. Depending on the type of
interfaces in your system, choices include
AES/EBU, S/PDIF, and Optical (S/PDIF). Selecting
Optical (S/PDIF) resets the Optical I/O port
(which is, by default, eight channels of
ADAT Optical I/O) to two channels of
S/PDIF Optical I/O.
7 For S/PDIF compatibility with Tascam DA-30
DAT recorders, select the Tascam option under
S/PDIF Format.
8 From the Input and Output channel pop-up
menus, select the physical ports (such as Analog
1–2 or Optical 1–2), that will be routed to the
corresponding Pro Tools input and output chan-
nels (such as Ch 1–2, Ch 3–4), listed on the left
side of the Main page.
Inputs and outputs of similar format are differ-
entiated in the input and output channel pop-
up menus. For example, the AES/EBU inputs and
outputs in the HD I/O enclosure are listed as
AES/EBU [Encl], while the AES/EBU inputs and
outputs on the factory-installed Digital I/O card
are listed (in pairs) as AES/EBU 1–2, AES/EBU
3–4, AES/EBU 5–6, and AES/EBU 7–8. For
HD I/Os equipped with the optional Digital I/O
Card, the additional AES/EBU I/O ports on the
optional card are listed as AES/EBU 9–10,
AES/EBU 11–12, AES/EBU 13–14, and AES/EBU
15–16.
Press Command+Left or Right Arrow keys
(Mac) or Control+Left or Right Arrow keys
(Windows) to move though the different
pages of the Hardware Setup dialog.
You can also press Command (Mac) or
Control (Windows) and the number keys
(1, 2, 3, 4, or 5) at the top of the QWERTY
keyboard to select the corresponding page of
the Hardware Setup. For example, press
Command+4 (Mac) or Control+4 (Win-
dows) to select the Monitor page for
HD OMNI.
See your peripheral’s guide for configuration
details and restrictions.