14
DIGITAL RACK MIXER M32R User Manual
1.3 Config/Preamp
(1)
GAIN Rotary Control
On a microphone preamplifier, input gain varies the amount of amplification
applied to the microphone. Adjust the preamp gain for the selected channel
with the
GAIN
rotary control.
(2)
LED Display
The LED display in the Config/Preamp section illustrates the signal input
level for the selected channel. This is shown as a value between 0 dB and
-30 dB. When there is a signal present, but below -30 dB, the SIG LED is lit.
When the signal exceeds 0 dB the
CLIP
LED illuminates.
Please note that, when pressing the
VIEW
button, the signal input level
displayed on the Main Display shows a value of between 0 dB and -60 dB.
(3)
FREQUENCY Rotary Control
The
FREQUENCY
rotary control selects the frequency at which
the low cut filter begins to filter unwanted frequencies for the
selected channel. The filter is engaged by pressing the
LOW CUT
button
(see below).
Please note that the low cut filter is only available for the 32 primary
input channels.
(4)
48 V
Phantom power is a method for transmitting DC electric power through
microphone cables to operate microphones that contain active electronic
circuitry. It is most commonly used with condenser microphones, though
many active direct boxes also use it. The technique is also used in other
applications where power supply and signal communication take place
over the same wires. Press the
48 V
button to apply phantom power on the
selected channel’s physical input.
(5)
Ø
An audio signal’s ‘phase’ refers to its position in a point of time along the
waveform cycle, with each cycle being 360°. Press the
Ø
button to reverse
the selected channel’s phase by 180°. This can be useful when using the
reverse phase function to cancel noise across more than one channel.
(6)
LOW CUT
Press the
LOW CUT
button to engage the low cut filter for the
selected channel.
Please note that the low cut filter is only available for the 32 primary
input channels.
(7)
VIEW
Press the
VIEW
button to access more detailed parameters on the
Main Display. See the section
Main Display - config
for more details.
1.4 Gate
(1)
THRESHOLD Rotary Control
A noise gate is a device that is used to control the volume of an audio
signal. Often used in conjunction with a compressor (see DYNAMICS),
which attenuate signals above a certain threshold, noise gates attenuate
signals that register below the threshold. By turning the
THRESHOLD
rotary control, the audio level at which the gate affects the signal
can be controlled.
(2)
LED Display
The LED display illustrates when the Gate is functioning for the selected
channel by illuminating the red
GATE
LED at the bottom of the display.
(3)
GATE
Pressing the
GATE
button engages the noise gate for the selected channel.
(4)
VIEW
Press the
VIEW
button to access more detailed parameters on the
Main
Display
. See the section Main Display - gate for more details.
1.5 Dynamics
(1)
THRESHOLD Rotary Control
Dynamic Range Compression, or just Compression is a device that is used
to control the volume of an audio signal. Often used in conjunction with a
noise gate (see GATE), which attenuate signals below a certain threshold,
compressors attenuate signals that register above the threshold. By turning
the
THRESHOLD
rotary control, the audio level at which the compressor
affects the signal can be controlled.
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