ASHLY ne24.24M [10/28] Audio functions
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ASHLY ne24.24M [10/28] Audio functions

ASHLY ne24.24M [10/28] Audio functions
Operating Manual - ne24.24M Matrix Processor
10
8. AUDIO FUNCTIONS
8.1 Input Functions
Editing of audio controls is done primarily in Protea System Software. Input and output expansion cards are autode-
tected, and the software automatically updates to display the current ne24.24M status. Note: Accidental, potentially destructive
loudspeaker damage can occur when abrupt changes are made to EQ, lter, or level controls, so plan carefully before making
radical changes to a live sound system. The following functions are available on all inputs; Mute, Preamp Gain, Signal Genera-
tor, Input Gain, Delay, EQ, Noise Gate, Autoleveler, Ducker, and Matrix Routing.
8.1a Input Mute
This turns off the input channel without changing gain settings. When an input channel is muted, that channel’s red
mute LED on the face panel is lit.
8.1b Input Preamp
This determines the up-front analog gain to an input signal. A good rule of thumb is to
allow 20dB of headroom above the nominal input signal level. Clipping occurs at +20dBu, so a
microphone nominally generating a -40dBu signal should have +40dB of gain, a 0dBu line level
input would be set to 0dB gain, etc.
8.1c Phantom Power
+48V Phantom power for condenser microphones can be provided to individual channels
by checking the <+48V Phantom Power> box in the preamp block for a given channel.
8.1d Push To Talk Mic
This check box and drop down menu selects the back panel logic input to serve as a
contact closure input channel engage.
8.1e Signal Generator
A selectable 0dBu white or pink noise generator is available just before the input meters
and input gain tool. If the signal generator is enabled (uncheck the bypass button), the noise gate for that input is disabled.
8.1f Input Gain
Different from the Preamp block, input Gain adjusts signal level from +12dB
to Off. Due to limitations within the graphical interface, ne tuning gain settings in
0.1dB steps is accomplished using the <up/down arrows> on the keyboard. Changes of
3dB are quickly accomplished using <PageUp/PageDown> buttons. To instantly return
a gain setting to 0dB, press <Ctrl + click>.
8.1g Input Delay
In large installations or
outdoor venues there are often
many speakers in various loca-
tions to get the best coverage
possible. Since sound travels
relatively slow through air (1130
ft/s at 20 deg. C), multiple loud-
speaker locations can create a
situation where the original audio
signal, simultaneously leaving all
loudspeakers, arrives at a single
point in the venue at several dif-
ferent times. Needless to say this
causes problems, and what may

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