Specifications

Play with the mute buttons for a while to get used to what we call Momentoggle, the
difference between a press and a hold. You will notice that if you hold a mute button, the
speaker will silence and come back on when the button is released. If the same mute
button is pressed, the function will latch and the speaker will stay silent until the button is
pressed again. It is good to get familiar with the timing of Momentoggle. If the Solo
button is held to engagement, pressing a button for a particular speaker silences the rest.
In other words, the Solo function logically inverts the Mute functions. This is not that
functional in stereo but in surround, solos with multiple latchings become good for
diagnostic listening purposes.
The Orange buttons engage listening functions. The Mono button adds the left and right
channel and presents the sum up the middle of the speakers. The Aux to Main button lets
the signal present at the Auxiliary Input jacks mix into the selected Input signal. There is
a level control on the ST front panel to set the mix. The Talkback button dims the
selected and aux signals in the speakers and headphones and engages the microphone so
that the talent can hear the engineer complaining about pronunciation and intonation or
timing. The Talkback Level control on the ST front panel sets the mic level in TB mode.
The Dim button lowers the selected speaker gain by 18 dB. The Additional Switching
buttons are for selecting sources on a future Dangerous Music box that will have video
and/or audio selectors. The Talkback and Dim buttons are under the spell of
Momentoggle.
The Green buttons select the input source, speaker system, subwoofer, and low pass filter
for the sub. The factory default settings for gain and subwoofer management are unity
gains and no subwoofer or filter engagement. One can turn the subs and/or filters on but
when a different speaker system is selected, the factory defaults will rule again until the
user programs the system with the Blue buttons.
Setup mode
Changing input gains, speaker system gains, subwoofer enabling/level offsets, and
filtering options are done in Setup mode. To enter, hold the Setup button for 1 second
and release. The blue light stays on indicating that the computer is ready for
programming. Holding the button again will exit Setup mode storing any changes that are
made to system configuration or gain. Pressing the PPI button while in Setup mode will
reboot the computer without saving changes and holding the PPI button while pressing
the LFE mute button then releasing the two will reset the memory back to the factory
defaults (useful when one wants to start from a known system configuration).
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