Studio Technologies 76D V.2.02 - Manual (Page 20)

Issue 2, June 2009 Model 76D/77 User Guide
Page 20 Studio Technologies, Inc.
for Surround
Dim Level
The dim function is used to reduce the post-
fader surround and stereo monitor output
levels by a preset amount. The reduction is
in dB relative to the post-fader surround and
stereo monitor outputs’ current level. There
are four dim level values available: –10.0,
–15.0, –20.0, and –25.0 dB.
Remote Mute All
Two configuration choices are associated
with the remote mute all function: disabled
and enabled. To utilize the remote mute all
function simply requires you to select the
enabled setting.
Remote Dim
Two configuration choices are associated
with the remote dim function: disabled and
enabled. To utilize the remote dim function
simply configure it for enabled.
Input Delay
A time delay can be added to the input sig-
nals, allowing compensation for delays that
may be present on associated video signals.
The selected time delay applies to all input
signals and cannot be applied selectively.
The configured delay time is referenced
to a sample rate of 48 kHz. In the case of
input signals with a sample rate of 48 kHz
the delay range is 0 to 340 milliseconds. For
other sample rates the time must be linearly
scaled. For example, for a sample rate of
96 kHz the actual time range is 0 to 170
milliseconds. In this case selecting a delay
of 120 on the Model 77 will result in an
actual time delay of 60 milliseconds. For
192 kHz sampling the time range is 0 to
85 milliseconds. Selecting a delay of 240
will result in a time delay of 60 milliseconds.
LFE Downmix Mode
By default, when the 5.1 to stereo down-
mix function is active the LFE channel
associated with a surround input is muted.
This removes LFE content from the “down-
mixed” signal. In most applications this is
appropriate. However, for special situations
a configuration mode allows the LFE chan-
nel to be part of the downmix signal flow.
When the LFE downmix mode is enabled,
if surround input A or B is the active input
and the 5.1 to stereo downmix function is
active, the LFE signal level is reduced in
level by 6 dB and added to both the left
and right output channels. As expected,
even when the LFE downmix mode is ac-
tive the LFE output channel will still mute
when 5.1 to stereo downmix is active.
Pre-Fader Surround Monitor
Output Mode
The pre-fader surround monitor output can
be configured as to its place in the Model
76D’s signal flow. The choices are pre- or
post-downmix. In the pre-downmix mode
the output channels will not be impacted
by the state of the downmix functions.
This setting would be appropriate if the
pre-fader surround monitor outputs were
being routed to a storage system, routed
to another facility, etc. In this case the ac-
tion of an operator enabling or disabling
the downmix functions won’t impact the
pre-fader surround monitor output signals.
If the post-downmix mode is selected the
pre-fader surround monitor outputs will
reflect the actions of the downmix func-
tions. This choice would be correct if, for
example, level meters were connected to
the pre-fader surround monitor outputs. In
this scenario an operator would want to
visually observe the actions that the down-
mix functions impart on the signals.