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ALC / LIM.
The Nagra Seven is equipped with a very sophisticated, fully programmable internal audio
control system that can be set as an audio limiter or ALC, or any combination between the
two. It is an entirely new approach that allows the user to adjust the parameters exactly as
desired. The different parameters of the system, such as the headroom, target, attack,
release and ratio can all be set with dropdown menus from the settings window. If the
GRAPHIC window is opened then the operating zone can be visualised to give a clearer
understanding of the settings. When the graphic display is shown, turning the left or right
potentiometer will adjust the parameters for the corresponding channel.
If the PRESET button is pressed a drop-down menu will appear allowing the user to choose
between several pre-programmed operational modes for the ALC / LIMITER. This is the
simplest selection for those not wishing to set all the parameters individually.
Preset:
Headroom:
Target:
Input attenuation:
Attack:
Delay:
Release:
Ratio:
Chapter IV
User selectable preset values
The range into which the signal can go before distortion
The upper limit of the operational zone
Analog input attenuation control
The reaction time – ideal to filter against activation by rapid
sounding HF signals
Time before the release is active.
The decay time of the ALC/Lim effect.
How much audio compression will be used (i.e. 6:1 means that 6dB
will be compressed to 1 dB)
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September 2013