Cedar DNS 4, Owner'S Manual

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CEDAR DNS 4 dialogue noise suppressor
Page 20
Processing
When you are in the Process page, pressing any of the row of four channel access buttons
at the top right of the unit brings its associated channel into focus. Once a given channel
has focus, its associated button is lit and you can adjust its parameters. Channels can
also be grouped and their parameters adjusted together.
The process is controlled by an encoder plus dedicated buttons for process on/off and
learn on/off. Normally the encoder is focused upon the Attenuation parameter. Clicking
it switches its focus to the Bias parameter, and a second click returns it to the
Attenuation. The encoder focus also reverts to Attenuation after a short timeout.
■
Process On/Off
Use the dns on button to switch the DNS processing on and off.
■
Learn
The Learn button controls whether or not the noise detector adapts continuously to
changes in the noise content within the audio signal. When it’s On, the DNS 4 continually
identifies the power and spectral distribution of the noise. When it’s Off, the noise
estimate is frozen at the last determined values and remains so until it’s switched on
again.
Note: Learn is not a method for taking a ‘noise fingerprint’ and, for most jobs, by far
the best results are obtained by leaving it switched on permanently.
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Channel selection
Before adjusting anything further, use the channel selector buttons 1- 4 to select the
individual channel or, if linked, the group of channels that you wish to control.
The process parameters
■
Attenuation
The default action of the encoder is to adjust the amount of noise attenuation applied to
the signal in the selected channel(s). The representation of the left-hand fader within
each channel shows the current position of the control, and the bargraph shows the
instantaneous amount of attenuation being applied to the signal. The solid bar shows the
average attenuation across all frequencies, and the shaded bar shows the maximum
attenuation across all frequencies.