Specifications

Pro Tools|HD Getting Started Guide48
Configuring 192 I/O and 192 Digital I/O
Controls
To configure controls for a 192 I/O:
1 With the 192 I/O selected in the Peripherals
list, click the Analog In tab for the following op-
tions:
• You can set your operating level on a chan-
nel-by-channel basis by selecting Reference
Level +4 dBu or –10 dBV. These settings
correspond to two different input connec-
tors on the rear of the 192 I/O. Refer to the
192 I/O Guide for more information on set-
ting operating levels.
• Each of the analog channels in the 192 I/O
has two Input Trims, labeled A and B, for
precisely calibrating and switching levels.
You can select Input Trim A or B on a chan-
nel-by-channel basis. Refer to the 192 I/O
Guide for information on setting the rear
panel trims.
• You can select Soft Clip on a channel-by-
channel basis. The Soft Clip limiter attenu-
ates the incoming analog signal, providing
extra protection from temporary clipping
transients that can cause digital distortion
when they exceed the maximum input of
the unit. With Soft Clip enabled, 192 I/O
supports an additional 4 dB of headroom
by rounding off the top 4 dB to the clip
point. This is useful for eliminating stray
transients or for emulating analog tape sat-
uration.
2 Click the Analog Out tab for the following op-
tion:
• Each of the analog channels in the 192 I/O
has two Output Trims, labeled A and B, re-
spectively. You can select Output Trim A or
B on a channel-by-channel basis.
To configure controls for a 192 Digital I/O or
192 I/O with an optional Digital I/O card:
 On the 192 Digital I/O or a 192 I/O with an
optional Digital I/O card, click the Digital tab to
set the Input Format (AES/EBU, TDIF, or ADAT
Optical) and enable real-time sample rate con-
version (in channel pairs, with the SR Conver-
sion option).
Hardware Setup dialog for 192 I/O, Analog In page
Hardware Setup dialog for 192 I/O, Analog Out page
At session sample rates above 48 kHz, sam-
ple rate conversion for the TDIF and Optical
(ADAT) inputs on the Digital I/O card is au-
tomatically enabled on all eight inputs of
the selected format.
Hardware Setup dialog for 192 I/O, Digital page