Studio Technologies 76D 2014 - Manual (Page 40)

Issue 11, May 2014 Model 76D/77 User Guide
Page 40 Studio Technologies, Inc.
for Surround
buttons control operation of the surround
and stereo outputs, reference level, mute
all, and dim functions. The rotary level
control is used to manually set the post-
fader surround and stereo monitor output
levels. These buttons and the rotary control
do not impact the pre-fader surround and
stereo input C direct monitor outputs.
Surround and Stereo Outputs
The surround/stereo function allows se-
lection between two different loudspeaker
systems. When the surround output is
selected the six post-fader surround moni-
tor output channels are active. The chan-
nels associated with the post-fader stereo
monitor output are muted. When the stereo
output is selected the left (L) and right (R)
channels associated with the post-fader
stereo monitor output become active; the
six channels of the post-fader surround
monitor outputs mute.
Remember that the Model 77 Control
Console can be configured to disable the
surround/stereo button. If the button is
pressed and the post-fader stereo moni-
tor output is not selected, this must be the
case!
Display Current Sample Rate
The surround/stereo monitor output select
button is also used to display the system’s
current sample rate value. Pressing and
holding the surround/stereo button will
cause the current sample rate value to
be displayed: 32.0, 44.1, 48.0, 88.2, 96.0,
176.4, or 192.0. This can be useful during
troubleshooting or just for general interest.
Once the button is released normal display
operation will resume.
Reference Level
The reference level button sets the post-
fader surround and stereo monitor output
levels to a preset value. Technical person-
nel, using a sound-pressure-level (SPL)
meter and precision signal source, should
have set this level to meet the require-
ments of the specific monitoring envi-
ronment. The LED associated with the
reference level button will light whenever
the function is active. The 4-digit display
will indicate the reference output level.
Note that the system’s default reference
level is –60.0 dB so “out of the box” the
Model 77 will display
–60.0 when reference
level mode is enabled.
How the rotary level control functions
whenever the reference level mode is
active depends on a configuration setting.
If the auto reference level off function is
disabled turning the rotary level control will
have no impact on the reference level func-
tion; it will remain active. If the auto refer-
ence level off function has been enabled
turning the rotary level control will cause
the reference level function to automati-
cally turn off.
The LED associated with the reference
level button can also serve as a calibra-
tion aid. If the reference level mode is
not active, whenever the post-fader sur-
round or stereo monitor output levels are
precisely the same as that stored for the
reference value the reference level LED
will flash. This exact level can be reached
through the use of the rotary level control,
either by itself or through the setting of the
rotary level control in conjunction with the
dim function. Whatever path the post-fader
surround and stereo monitor outputs take
to reach the reference level value, it will
cause the reference level LED to flash!