Configuring Avid HD Audio Interfaces
HD OMNI supports up to eight channels of simultaneous I/O and multiple I/O formats (such as analog, AES/EBU, ADAT Optical, and S/PDIF). HD I/O, 192 I/O, 192 Digital I/O, 96 I/O, and 96i I/O audio interfaces support sixteen channels of simultaneous I/O and multiple I/O formats (such as analog, AES/EBU, ADAT Optical, S/PDIF, and TDIF). HD MADI supports up to 64 channels of MADI I/O.
The Main page of the Hardware Setup 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 allows you to route any of the inputs or outputs on your audio interfaces to channel assignments in the Pro Tools mixer.
Additional pages are available to configure other controls for each audio interface (such as setting operating levels).
2 From the Peripherals list, select the audio interface connected to the first card in your system. This will be the interface at the top of the list.
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In many cases, you will use Internal. The other choices are for resolving Pro Tools to external clock sources. Depending on your audio interface, 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 devices attached to the audio interface, select the appropriate output from the Ext. Clock Output pop-up menu.
6 Select which digital I/O port on your audio interface enclosure is active by selecting the corresponding 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 channels (such as Ch 1–2, Ch 3–4), listed on the left side of the Main page.
Inputs and outputs of similar format are differentiated 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 a second 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.
9 Configure any specific controls for your audio interface:
10 For additional audio interfaces, select it in the Peripherals list, and repeat the above steps.
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