M-AUDIO Pro Tools Recording Studio - Manual (Page 70)

Pro Tools Reference Guide 52
Example: Configuring
Pro Tools|HD Hardware Settings
On Pro Tools|HD systems, you configure Hard-
ware settings for each audio interface connected
to your system. For example, Pro Tools|HD sys-
tems can have 192 I/O, 192 Digital I/O, 96 I/O,
or 96i I/O audio interfaces connected to
Accel Core or HD Core and HD Accel or HD Pro-
cess cards in the system. The 192 I/O,
192 Digital I/O, and 96 I/O can have additional
interfaces attached (including older Digidesign
audio interfaces—Legacy I/Os—such as the
888|24 I/O, 882|20 I/O or 1622 I/O). For more
information, see Chapter 4, “Pro Tools Sys-
tems.”
Configuring Audio Interfaces
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.
The Main page also provides controls for defin-
ing whether Expansion Port or Legacy Port pe-
ripherals are active.
Additional pages are available to configure other
controls for each audio interface (such as setting
operating levels). For details, refer to the Setup
Guide for your system, or to the guide for your
audio interface.
To configure Pro Tools|HD audio interfaces:
1 Choose Setup > Hardware.
2 From the Peripherals list, select the Digidesign
audio interface connected to the first card in
your system. This will be the interface at the top
of the list.
3 Click the Main tab.
4 From the Clock Source pop-up menu, select
the appropriate clock source for the system.
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 option is enabled and Legacy
Peripheral is defined, the Ext. Clock Output set-
ting is automatically set to Slave Clock (256x
sample rate). To reset the Ext. Clock Output set-
ting to Word Clock, select the Expansion I/O op-
Hardware Setup dialog for 192 I/O, Main page
Identify audio interface connections at any
time by selecting the interface name in the
Peripherals list, then clicking Identify. All
LEDs on the corresponding interface front
panel illuminate.