User Manual-MADI

Chapter 4: Configuring HD OMNI in Pro Tools 25
Sample Rate Conversion Enables (or disables)
real-time sample rate conversion for the selected
Digital 1–2 Input Format. When enabled, if the
sample rate of the digital input source differs
from the Pro Tools session sample rate, HD
OMNI converts the incoming sample rate to the
session sample rate in real time.
S/PDIF Output Format For S/PDIF compatibility
with Tascam DA-30 DAT recorders, select the
Tascam option under S/PDIF Output Format.
Ext. Clock Output Selects the appropriate output
from the Ext. Clock Output pop-up menu to send
clock output to other devices attached to HD
OMNI. The available Ext. Clock Output options
vary depending on the sample rate.
Analog In
The Analog In page of the Hardware Setup dia-
log lets you set the Reference Level for the phys-
ical analog inputs on HD OMNI. You can also
apply a limiter to each of the four analog inputs.
Reference Level
Select the appropriate Reference Level for each of
the four analog input channels. Input operating
levels are switchable between +4 dBu and
–10 dBV operation.
Limiter
HD OMNI provides options for limiting on each
of the four input channels. Select an option
from the corresponding Limiter pop-up menu:
None Applies no limiting to the incoming ana-
log signal.
Soft Clip Attenuates the incoming analog signal,
providing extra protection from temporary clip-
ping transients that can cause digital distortion
when they exceed the maximum input of the
unit. With Soft Clip enabled, HD OMNI sup-
ports an additional 4 dB of headroom by round-
ing off the top 4 dB to the clip point. This is use-
ful for eliminating stray transients or for
emulating analog tape saturation.
If the session sample rate is higher than
96 kHz and
Digital 1–2 Input Format is set
to
Optical (S/PDIF), the Sample Rate Conver-
sion
option is automatically enabled (since
Optical S/PDIF only supports sample rates
up to 96 kHz).
Sample rate conversion increases latency by a
variable amount depending on the difference
between sample rates.
Hardware Setup, Analog In page