Studio Technologies 78 2004 - Manual (Page 27)

Model 78/79 User Guide Issue 5, January 2004
Studio Technologies, Inc. Page 27
for Surround
Operation
Now that you’ve installed and configured
the system, you’re ready to go. You should
find operation very easy.
Model 78 Central Controller
The Model 78’s front panel contains two
LEDs. The power LED should be lit when-
ever AC mains power is connected. The
data LED will light whenever a MIDI sys-
tem-exclusive message is received from
the Model 79.
Model 79 Control Console
StudioComm operation is controlled us-
ing the Model 79 Control Console and, if
connected, the remote control inputs. To
make things easy to describe, we’ve di-
vided the StudioComm functions into six
main groups: input source and LFE +10
selection, downmix, monitor output general
functions, input mute/solo, output mute,
and remote controls.
Input Source and LFE +10
Selection
Input source selection is simple. To select
an input source for routing to the monitor
output, press one of the two input source
buttons. The corresponding LED will light
to let you know that the input has been se-
lected. The LFE +10 LED associated with
that source will light if that input has been
selected to have +10 dB gain added to its
LFE channel. You can select both input
sources simultaneously. The two inputs will
be summed (combined). Start by pressing
and holding one of the input source but-
tons. While that button is pressed, add the
second input by momentarily pressing the
button associated with that input.
A special configuration mode allows an in-
put to be disabled. This would be appropri-
ate if an input is not connected to an audio
source. If you press an input source button
and the previously selected input source
does not change, the newly selected input
has been disabled.
To allow accurate monitoring of some
cinema formats, 10 dB of gain can be
added to the LFE input channel associated
with each of the sources. For flexibility, the
inputs can be independently selected to
add 10 dB or remain at unity gain. To add
10 dB of gain to the LFE input associated
with Surround A, simply press and hold
the Surround A button for two seconds. To
return to unity gain, simply press and hold
the button again for two seconds. The LFE
+10 indicator will display the status of the
LFE gain function. Use the Surround B
button to select unity or 10 dB operation
for input surround B.
Downmix
The four downmix modes allow an opera-
tor to perform “real world” compatibility
checks. In this way a 7.1 surround input
source can be “folded” down to 5.1, LCRS,
stereo, and mono. How these modes af-
fect the audio signals will greatly depend
on how the Model 79 was configured at
the time of installation. Being aware of the
selected configuration will allow the down-
mix modes to serve a more useful role. For
technical details on the downmix modes
please refer to the Technical Notes section
of this guide.
Using the downmix modes simply requires
pressing one of the downmix buttons. The
downmix buttons are always set to “latch”
the function on and off. The associated