Ashly 3.04 Operating Manual page 24

Operating Manual - nX, nXe, and nXp Power Amplifiers
Pluggable DSP Block Descriptions
1) Dynamics Controls
Brick Wall Limiter
The Brick Wall Limiter is a compressor with fixed ratio
(infinite). It allows for user-adjustable threshold, attack time and
release time. It also allows for assignment to a Link Group to link
the parameters of this block with limiters on other channels. For a
full-featured compressor/limiter, refer to the Compressor.
Parameters:
Threshold - The signal level at which the Limiter begins to
attenuate the signal. (+20 to -20 dBu).
Ratio - The amount of attenuation to the signal above the
threshold point. Fixed at infinite, meaning no signal beyond this level.
Attack Time - The rate (in ms/dB) at which the Limiter
attenuates the input signal, once the signal reaches threshold.
Release Time - The rate (in ms/dB) at which the attenuation
will return to normal, once the signal falls below threshold.
Link Group - Group to which all parameters are assigned,
for simultaneous adjustment to multiple Limiters
Show Meter On Graph - Overlays the input/output level
meters on the Limiter graphical display.
Detector - Fixed at Peak.
Compressor
The Compressor function is a full featured Compressor/
Limiter. It allows for user-adjustable Threshold, Ratio, Attack Time,
Release Time and Detector type. The Compressor also allows for
assignment to a Link Group to facilitate adjustment of multiple
Compressor/Limiters simultaneously. A separate Attenuation Bus
assignment is provided to allow multiple limiters to force their gain
reductions to track each other, ie stereo signals. For simple peak
limiting, the Brick Wall Limiter can also be used.
Parameters:
Threshold - The signal level at which the Compressor begins
to attenuate the signal. (+20 to -20 dBu).
Ratio - The amount of attenuation to the signal above the
Threshold point. Range is 1.2:1 to infinite.
Attack Time - The rate (in ms/dB) at which the Compressor
attenuates the input signal, once the signal reaches Threshold.
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