Studio Technologies 76DA V.4.12 - Manual (Page 19)

Model 76DA/77 User Guide Issue 9, May 2014
Studio Technologies, Inc. Page 19
for Surround
Model 77 units. Be sure that any selected
address does not conflict with addresses to
be assigned to Model 71 units.
Stereo Input C Sample Rate
Converter
Circuitry associated with stereo input C can
provide sample rate conversion (SRC) for
digital audio signals connected to that input.
The acceptable input range for sample rate
conversion is very wide, but is dependent
upon the output sample rate. With an out-
put sample rate of 48 kHz any signal with
a sample rate over a range of 8 to 216 kHz
can be properly monitored by the system.
This capability can be especially useful with
signals that are not synchronized with re-
spect to the others connected to the Model
76DA, even if the sample rate is identi-
cal. The only compromise is that the SRC
process adds a fixed input-to-output (group)
delay of approximately 1 millisecond, a val-
ue that shouldn’t impact most installations.
As such, it’s recommended that the sample
rate converter remain enabled. However
there might be special cases where this re-
source isn’t desired and it can be disabled.
Post-Fader Stereo Digital and
Analog Monitor Outputs
In addition to the post-fader surround digi-
tal and analog monitor outputs, separate
post-fader stereo digital and analog monitor
outputs are also provided. By default the
stereo outputs can be enabled by an opera-
tor. In applications where stereo monitor
loudspeakers are not connected to either of
the post-fader stereo monitor outputs, the
outputs can be disabled. This can minimize
confusion, preventing an operator from
attempting to select the post-fader stereo
digital and analog monitor outputs.
Bass Management
The Model 76DA incorporates flexible and
sonically excellent bass management ca-
pabilities which can impact both the digital
and analog post-fader monitor outputs. It
is, however, limited to functioning only at
sample rates of 44.1, 48, 88.2, and 96 kHz.
Five configuration parameters are used to
enable or disable bass management as
well as to select the characteristics of the
associated audio filters. While the settings
are simple to make, great care must be
taken in first reviewing the entire monitor
system. Only after a full understanding of
the performance of the associated sur-
round and, if present, stereo loudspeaker
systems are determined can a plan for
bass management be established.
Bass management can be enabled so that
the function is active when the surround
post-fader monitor outputs are enabled. It
can also be independently enabled so that
it can be active when the stereo post-fader
monitor outputs are enabled. By default
bass management for both outputs is
disabled. The crossover point of the bass
management filters can be selected from
among four choices: 40, 50, 60, or 80 Hz.
The slope of the low-pass and high-pass
filters associated with bass management
can be independently selected. The choic-
es are 12 dB/octave or 24 dB/octave with
the latter being the default.
Mute/Solo Bass Management
Mode
The Model 76DA’s mute/solo function can
be configured for how it performs in appli-
cations where bass management has been
enabled. This is a somewhat-esoteric topic
but can be important in certain situations.
The default setting for the mute/solo bass