Studio Technologies 76DA V.4.00 - Manual (Page 19)

Model 76DA/77 User Guide Issue 3, July 2012
Studio Technologies, Inc. Page 19
for Surround
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 output 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 respect to the others
connected to the Model 76DA, even if the
sample rate is identical. The only compro-
mise is that the SRC process adds a fixed
input-to-output (group) delay of approxi-
mately 1 millisecond, a value that shouldn’t
impact most installations. As such, it’s rec-
ommended that the sample rate converter
remain enabled. However there might be
special cases where this resource 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 moni-
tor outputs are also provided. By default
the stereo outputs can be enabled by an
operator. In applications where stereo
monitor loudspeakers are not connected to
either of the post-fader stereo monitor out-
puts, the outputs can be disabled. This can
minimize confusion, preventing an opera-
tor 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.
Four 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 sur-
round post-fader digital and analog monitor
outputs are enabled. It can also be inde-
pendently enabled so that it can be active
when the stereo post-fader digital and
analog monitor outputs are enabled. By
default bass management for the surround
and stereo outputs is disabled. The slope
of the low-pass and high-pass filters asso-
ciated with the surround and stereo inputs
can be independently selected. The choic-
es are 12 dB/octave or 24 dB/octave with
the latter being the default. Whether 12 or
24 dB/octave is selected the low- and high-
pass filter cut-off frequencies are fixed to
be –6 dB at 80 Hz.
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