User Guide

Issue 4, December 2020 Model 780-01/790 User Guide
Page 8 Studio Technologies, Inc.
for Surround
An LFE low-pass filter function is provided
as a means of checking the audio content
in the LFE channel of a selected surround
input. The user can enable and disable the
function as required, helping to ensure that
the proper signals are being mixed to the
LFE channel. Having the correct audio con-
tent in the LFE channel can be critical as
the LFE channel is typically band-restricted
during distribution.
The post-fader monitor output levels can be
controlled by way of a large, easy-to-use
rotary control. The control, actually a digital
encoder, allows level selection in precise
0.5-dB steps. The auto mute all function
causes the post-fader monitor output chan-
nels to automatically mute whenever the
output level control reaches maximum at-
tenuation. Using the reference level func-
tion, the post-fader monitor output levels
can be set to a pre-configured value. This
is provided for audio-with-picture applica-
tions that require a specific monitor output
level. The reference level is easily config-
ured by taking an electronic “snapshot”
of the desired monitor output level. For
user confirmation, the 4-digit LED display
will show the level of the post-fader moni-
tor output channels. To match the needs
of a facility, the display can be configured
to show either the attenuation level or the
sound pressure level (SPL).
The dim function allows the post-fader
monitor output level to be reduced by a
fixed dB amount. The dim level is config-
ured from among four available values.
A mute all function allows the post-fader
monitor output channels to be simultane-
ously muted. The input mute/solo section
allows an input channel to be muted or
monitored as desired. Multiple channels
can also be simultaneously selected for
muting or “soloing.”
Two output mute functions are also pro
-
vided. One button allows the seven main
channels of the post-fader monitor output
to be muted. A second button allows the
subwoofer (SUB) channel of the post-fader
monitor output to be muted. The output
mute functions, along with the input mute/
solo function, allow a user complete flex-
ibility when checking an input source and
its path to the loudspeaker system. These
mute and solo resources are crucial in a
multichannel environment, especially when
signals are passing through the bass man-
agement function.
Three downmix functions allow the selected
input source to be checked for compatibility
with common audio channel formats. This
can help ensure that surround and stereo
mixes correctly “fold down” into formats
that utilize less channels than the original.
Errors can be quickly identified and then
corrected. The downmix functions, To 5.1
and To Stereo, apply only to the two sur-
round (7.1) sources. The To Mono downmix
function applies to the surround and stereo
inputs. Several of the downmix parameters
can be configured to best meet the needs
of an application. The downmix functions al-
ways impact the post-fader monitor output.
A configuration setting allows the pre-fader
monitor output to be selected for pre- or
post-downmix operation.
For flexibility, the StudioComm for Surround
system is designed to easily integrate with
equipment such as production intercom
systems, on-air or recording tally signals,
and audio consoles. Two remote-control
inputs provide access to the mute all and
dim functions. By providing access to these
functions, talkback or slate activity from an
audio console or other communications
system can control the level of the post-
fader monitor outputs.