Junger Audio b46 - Digital Audio Leveler - Manual (Page 10)

2. FUNCTION DESCRIPTION
page 2-4 operation manual b46, chapter 2 -Function description-
The Level Magic ™ process needs to be setup in three steps
- select one of the default presets for your apllication
(see preset description in chapter 5)
- adjust the operation level and peak level referring to
standards that are using for your application
- if the default preset is not giving satisfying results change
the parameters indivdually
Level Magic ™ is using a unique combination of QP and RMS level
detectors to analyze the incoming audio signal. In comparing QP and
RMS measurement results we can find out how much transients are
coming in. Dependent on that the necessary resulting gain is controlled
in relation between transient processor and AGC.
Transient processor is doing fast gain change and the AGC is doing
slow gain change (depending on settings). The way how Level Magic is
acting on the audio is mostly determined by balancing between slow
and fast gain changing process. The AGC should be set in a way that
the gain change is mostly inaudible (1dB per 5 seconds or slower). The
Transient Processor should be set that incoming level jumps are
reduced but originally dynamic range is not changed too much. As
more possible gain by the Transient processor as more reduction of
the dynamic range is coming with.
SOFT level control:
AGC range …15dB, time >=2min
Transient range …4dB, soft process
MID level control: AGC range …12dB, time >=1min
Transient range …6-8dB, mid process
HARD level control: AGC range …10dB, time >=40sec
Transient range …10dB, hard process
Parameter description:
AGC
OP-level operation level, target level for the AGC and for
the Transient Processor
Range max. gain by the AGC
Time time to reach the max. gain change
Gate threshold level that the AGC stops dynamic gain
change and is moving gain slowly to the long
term average gain change value
Transient Processor
Process a combination of level ratio and release
characteristic for the fast gain change (soft, mid,
hard)
Range max. gain by the Transient Processor
Adjustment
procedure
Process
description
Parameter
description
Transient
Processor
AGC
Level
Detection
Limiter