Junger Audio d06 - Digital Audio Leveler - Manual (Page 9)

2. FUNCTIONAL DESCRIPION
operation manual d06, chapter 2 - Functional Description - page 3 of 8
All signal processing is done in the digital domain by Texas Instruments
floating point signal processors. The use of 32 bit word length for calculation
ensures that there is no deterioration in signal quality, even if an audio signal
with a maximum word length of 24 bit is input into the processing of the unit.
GAIN means linear amplification of input signals. The input gain can be
changed in steps of 0.1 dB , within a range from -20...+20 dB for both
channels.
Level Magic ™ is a unique algorithm to make automated audio levelling
possible.
2.3
AUDIO SIGNAL
PROCESSING
2.3.1
GAIN
2.3.2
AUDIO LEVELLER
LEVEL MAGIC™
AGC
Input level change
Pic. 2 is showing a
theoretical level change of
+5dB and –5dB around
program level.
Working with AGC
In pic.3 a conventional
AGC is used to adjust the
level. As we can see the
AGC needs a certain time
to react, that is necessary
for mostly inaudible gain
correction. But that’s too
long to get a proper
correction of the input level
change.
Level Magic ™
Level Magic ™ is a unique
combination of a transient
processor and an adaptive
AGC process. The
transient processor can fill
the lack of level control
against the slow acting
AGC. The total gain of
Level Magic ™ is the
addition of the gain by the
transient processor and the
gain of the AGC.
adaptive
AGC
Transient
Processor