Avid HD OMNI Preamp, I/O, and Monitoring Pro Tools HD Series Interface - Manual (Page 11)

Chapter 2: HD OMNI Overview 7
High Pass Filter Enables (or disables) a
12 dB/octave high-pass filter with a roll-off start-
ing at 85 Hz for the Channel 1 and Channel 2
inputs. The High Pass Filter button LED lights
when the high-pass filter is enabled. This option
is not available when the Input Type is set to
LINE.
When Link 1 & 2 is disabled, the High Pass Filter
can be independently enabled (or disabled) on
Channels 1 and 2 by pressing the PREAMP En-
coder to select the desired channel.
Phase Invert Inverts the phase for the Channel 1
and Channel 2 front panel inputs. The Phase In-
vert button LED lights when this option is en-
abled.
When Link 1 & 2 is disabled, Phase Invert can be
independently enabled (or disabled) on Chan-
nels 1 and 2 by pressing the PREAMP Encoder to
select the desired channel.
PREAMP Display Shows the gain value (+10 to
+65 dB).
When Link 1 & 2 is disabled, gain boost or atten-
uation for either Channel 1 (P1) or Channel 2
(P2) can be independently adjusted by pressing
the PREAMP Encoder to select the desired chan-
nel.
PREAMP Encoder Lets you adjust the input gain
for MIC and INST inputs (by rotating the en-
coder), and toggle front panel controls between
the two preamp channels (by pressing). Press
the encoder to toggle between P1 and P2 (Chan-
nel and Channel 2). Turn the encoder clockwise
to increase and counterclockwise to decrease the
input gain for the selected channel (from +10 to
+65 dB). Gain can be adjusted in 1 dB incre-
ments.
LINK 1 & 2 Links (or unlinks) controls for the
Channel 1 and Channel 2 front panel inputs.
The Link 1 & 2 button LED lights when this op-
tion is enabled. If the two channels are linked,
when levels between channels 1 and 2 are differ-
ent, the difference is maintained when changed
the levels until an upper or lower limit (+10 or
+65) is reached. When the upper or lower limit
is reached by one of the channels, you can con-
tinue to adjust the level of the other channel un-
til the limit is reached, but the difference be-
tween the two channels is no longer
maintained.
INSERT Enables (or disables) the returns for any
hardware inserts connected to the back panel
Channel 1 and Channel 2 input and output
pairs. Note that the sends are always active.
When Link 1 & 2 is disabled, INSERT can be in-
dependently enabled (or disabled) on Channels
1 and 2 by pressing the PREAMP Encoder to se-
lect the desired channel.
Preamp Signal Path
The Channel 1 and Channel 2 front panel in-
puts use the following signal path:
Input Signal > Pad > Preamp > HPF > Insert >
Limiter > ADC > Phase Invert
Synchronization and Sample Rate
LEDs
Synchronization and Sample Rate LEDs