Studio Technologies 76DA V.3.01 - Manual (Page 22)

Issue 2, April 2011 Model 76DA/77 User Guide
Page 22 Studio Technologies, Inc.
for Surround
reduced in level by 6 dB and added to both
the left and right output channels. As ex-
pected, even when the LFE downmix mode
is active the LFE output channel will still
mute when 5.1 to stereo downmix is active.
Pre-Fader Surround Digital
Monitor Output Mode
The pre-fader surround digital monitor out-
put can be configured as to its place in the
Model 76DA’s signal flow. The choices are
pre- or post-downmix. In the pre-downmix
mode the digital monitor output channels will
not be impacted by the state of the downmix
functions. This setting would be appropriate
if the pre-fader surround digital monitor out-
puts were being routed to a storage system,
routed to another facility, etc. In this case the
action of an operator enabling or disabling
the downmix functions won’t impact the pre-
fader surround digital monitor output signals.
If the post-downmix mode is selected the
pre-fader surround digital monitor outputs
will reflect the actions of the downmix func-
tions. This choice would be correct if, for ex-
ample, level meters were connected to the
pre-fader surround digital monitor outputs.
In this scenario an operator would want to
visually observe the actions that the down-
mix functions impart on the signals.
Channel Pop Solo Mode
Offset Levels
Two parameters can be configured that
determine how the channel pop solo func-
tion impacts audio levels. The up offset level
sets the amount of increase (gain) that a
channel will experience when it is soloed in
the channel pop solo mode. The down offset
level sets the amount of decrease (attenu-
ation) that the non-soloed channels will
experience when a channel is active in the
channel pop solo mode.
Post-Fader Monitor Output
Level Offsets
To provide assistance during room calibra-
tion, the relative output levels of the post-
fader surround and stereo monitor output
channels can be adjusted over a limited
range. The eight channels can be adjusted
in 0.5-dB steps over a ±12-dB range. During
configuration the displayed value represents
the dB level difference as compared to the
nominal output level. In most cases one sur-
round and one stereo channel should serve
as the overall reference level and not be
changed. This is typically the center channel
for surround and the left channel for stereo.
The configured output level offset values
apply to both the digital and analog sur-
round and stereo monitor outputs. It is not
possible to configure a specific channel’s
digital and analog monitor output level off-
sets to independent values.
This feature is provided primarily for use
when the post-fader monitor output chan-
nels are connected to loudspeaker sys-
tems that don’t offer a means of “trimming”
the input sensitivity of individual channels.
Without this capability, minor adjustments
to the output level of specific loudspeakers
to account for room acoustics wouldn’t be
possible.
It’s also possible to use the StudioComm’s
output level offset capability to adjust the
overall post-fader monitor output levels to
allow matching to the input sensitivity of
loudspeaker systems. In this case all the
channels (six for surround, two for stereo)
would be configured to have the same out-
put level offset setting. For example, the six
surround channels could all be configured to
have a –3.5 dB output level offset. However,
great care must be taken when configuring
a system in this manner. The dynamic range