Junger Audio b42 - Dynamics Processor - Manual (Page 13)

2. FUNCTION DESCRIPTION
operation manual b40, chapter 2 -Function description- page 2-7
The Multi-loop structure also permits a short time delay between the
control circuit and the gain changing element. The gain control circuit
has time to preview the signal and become active before it reaches the
output. This is particularly important for the limiter, which provides a
precisely leveled output signal absolutely free of overshoots (clipping).
Signal compression and the loudness enhancement of the digital
audio signal can be achieved by combining two dynamic range control
processes: firstly, the compression achieved by increasing small and
medium signal levels and secondly, linear amplification combined
with the inaudible limitation of individual, remaining peak levels with
the limiter.
In the gain change mode the operation of compressor and limiter can
be observed on the display. For smaller signal levels the compressor
causes additional amplification which however decreases the higher
the signal level is . With full scale levels the compressor is practically
ineffective so that even an increase of the RATIO will have no effect.
If you now increase the linear amplification GAIN, individual peak
levels are raised above the limiter threshold and limited inaudibly. All
other signal components can however be increased. If the gain is too
large also medium levels are treated by the limiter, which means that
the limiter then reduces the signals continually and again reduces the
additionally applied amplification.
The display for Limiter-Gain-Reduction should be in the region of 0....-6
dB and should not light up red continuously, so that a dynamic
limitation only applies to signal peaks.
Then the signal compression and therefore also the increase of
loudness is at its most effective.
2.4.1
SELECTION OF
PARAMETERS TO
INCREASE
LOUDNESS
A A
f
delay
1
1
2
2
n
m
f
Multi - Band Multi - Loop