Studio Technologies 76DA V.4.00 - Manual (Page 39)

Model 76DA/77 User Guide Issue 3, July 2012
Studio Technologies, Inc. Page 39
for Surround
Surround and Stereo Digital and Analog
Outputs
The surround/stereo function allows
selection between two different loudspeak-
er systems. When the surround output is
selected the six post-fader surround chan-
nels associated with both the digital and
analog monitor outputs are active. The
channels associated with the post-fader
digital and analog stereo monitor outputs
are muted. When the stereo output is
selected the left (L) and right (R) channels
associated with both the post-fader digital
and analog stereo monitor outputs become
active; the six channels associated with
the post-fader surround digital and analog
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 outputs are 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 digital and
analog monitor output levels to a preset
value. Technical personnel, using a sound-
pressure-level (SPL) meter and precision
signal source, should have set this level
to meet the requirements of the specific
monitoring environment. The LED associ-
ated 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 surround
or stereo digital and analog monitor out-
put levels are precisely the same as that
stored for the reference value the refer-
ence 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 con-
trol 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!
Mute All
Pressing the mute all button causes the
output channels associated with the post-
fader surround and stereo monitor outputs
to mute. The 4-digit display indicates the
mute condition by showing four dashes