Studio Technologies 76D V.2.02 - Manual (Page 36)

Issue 2, June 2009 Model 76D/77 User Guide
Page 36 Studio Technologies, Inc.
for Surround
electrically “after” the input source selec-
tion, downmix, and level control functions.
The mute/solo mode button and the six
channel mute/solo buttons, along with as-
sociated LEDs, work together to provide
excellent operating flexibility. The channel
mute/solo mode button allows the operator
to select between the mute and solo func-
tions. It is also used to select which solo
mode, normal or channel pop, is active.
Going from mute mode to solo mode, or
vice-versa, clears all active mutes or solos.
Pressing the mode button twice is a legiti-
mate means of quickly clearing muted or
soloed channels. To mute or solo a chan-
nel simply requires pressing one of the
channel mute/solo buttons. The buttons
function in a press-to-enable/press-to-
disable “latching” mode. Multiple channels
can be muted or soloed at the same time.
The LED associated with any muted or
soloed channels is used to indicate that
the function is active.
The mute/solo button is also used to select
the solo mode, the choices being normal
or channel pop. Simply press and hold the
mute/solo button for a few seconds until
the LED associated with the solo mode
lights in the desired manner; steady to
indicate normal solo mode and flashing
for channel pop solo mode. Once the state
of the mode has changed as indicated by
the LED (steady-to-flashing or vice-versa)
the desired solo mode becomes active
and the mute/solo button can be released.
The selected solo mode will be maintained
even after the system is powered down
and subsequently powered up.
Display and Display Mode
The Model 77’s 4-digit LED display shows
the post-fader surround and stereo monitor
output level as either the amount of attenu-
ation or the sound pressure level (SPL).
Both will indicate level in dB. What the
digits actually represent will depend upon
how the Model 77 has been configured.
Display in dB Attenuation
If configured for the attenuation mode the
display will show the output level as an
attenuation value in reference to the maxi-
mum output. This is in the form of 0.5-dB
steps less than the maximum of 0.0 dB. So
a display of –40.5 would indicate that the
surround or stereo monitor output is set to
be 40.5 dB below the maximum level. As
the rotary level control is moved counter-
clockwise the output level will go down and
the indicated value will get more negative.
Display in dB SPL
If the Model 77 is configured to display
the monitor output level in dB SPL, the
4-digit display will always show the output
level in positive numbers. These numbers
are intended to represent the sound pres-
sure level in dB SPL, a figure that should
directly relate to the actual sound pres-
sure level that the surround or stereo
loudspeaker system is presenting to users.
(Typically, the level value would actually
be in dBC, the C-weighted sound pressure
level.) When the reference level button is
enabled, or the rotary level control is set so
that the reference level has been reached,
the display will typically show something
in the range of 82 to 87 dB. Assuming that
the monitoring environment has been cor-
rectly calibrated, this would indicate that
an average listening level of 85 dB, for
example, had been achieved.
Channel Pop Solo Display
As has been previously discussed, the
channel pop solo mode offers a unique