User Guide

Issue 4, December 2020 Model 780-01/790 User Guide
Page 38 Studio Technologies, Inc.
for Surround
Displaying the Current Sample Rate
The LFE low-pass filter button is also used
to display the system’s current sample rate
value. Pressing and holding the LFE low-
pass button will cause the current sample
rate value to be shown on the 4-digit dis-
play. The possible values displayed will be
44.1, 48.0, 88.2, or 96.0. This can be use-
ful during troubleshooting or just for gen-
eral interest. Once the button is released
normal display operation will resume.
Rotary Level Control
The rotary level control is used to manually
adjust the post-fader monitor output level.
The level control provides the ability to
adjust the post-fader monitor output level
over a 70-dB range. Technically, the rotary
level control is a 24-step-per-revolution
mechanical encoder. The amount of level
change in dB per step (per “click”) will de-
pend on how quickly the control is turned.
When rotated slowly, each step represents
a 0.5-dB change in level. In this case,
to traverse the entire level range would
require rotating the control more than five
full turns. But the Model 790’s software
detects when the control is rotated more
quickly and increases the amount of level
change in dB per step. A little experimenta-
tion will allow the user to acquire a good
“feel” for how best to use the control.
The reference level LED will flash when
the rotary level control sets the output level
to be the same as the stored reference
level. Whenever the rotary level control
attempts to set the output level to be less
than –70.0 dB, the post-fader monitor
output channels will automatically mute.
As previously discussed, the 4-digit display
indicates the mute condition by showing
four dashes (– – – –).
If the mute all function is active the rotary
level control won’t have an impact on the
post-fader monitor output level. It’s also not
active whenever the reference level function
is active, except if the auto reference level
off function has been enabled. If the dim
function is active, turning the rotary control
will automatically disable the dim function.
Input Mute/Solo
The input mute/solo functions allow specific
input channels to be selected for individual
or group mute or “solo” monitoring. The
functions take place electrically “after” the
input source selection and input delay func-
tions but “before” the LFE low-pass filter,
downmix, output level, and output mute
functions.
The input mute/solo mode and input mute/
solo channel buttons, along with associated
LEDs, work together to provide excellent op-
erating flexibility. The input mute/solo mode
button allows the user to select between the
mute and solo functions. Going from mute
mode to solo mode, or vice-versa, clears all
active mutes or solos. Pressing the mode
button twice is a legitimate means of quickly
clearing muted or soloed channels. To mute
or solo a channel simply requires pressing
one of the eight input 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. LEDs associated with a muted
or soloed channel will light to indicate that
the function is active.
Output Mute
The two buttons associated with the output
mute function provide a means of directly
muting the post-fader monitor output chan-
nels. These serve as an aid in observing
the performance of the loudspeaker system.