Junger Audio b42 - Dynamics Processor - Manual (Page 9)

2. FUNCTION DESCRIPTION
operation manual b40, chapter 2 -Function description- page 2-3
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 or output signals. The input or
output gain can be changed in steps of 0.1 dB , within a range from -
15...+15 dB.
Adjustment of GAIN is channel independent.
Below an adjustable threshold level an expander can be activated
which can lower the amount of noise signals.
1:4.0
OFF
ratio
-50
-40
-30
-20
-10
[dBFS] -10 -20 -30 -40 -50 -60
output
input
range
20 dB
threshold
level
-20...-50, off
The de-esser is a special processing function to reduce S-
frequencies of speakers. This can be done either by using a
compressor with frequency selective side chain, or by dynamic filtering
of voice signals.
The de-esser of the b42 uses a sophisticated dynamic filtering
algorithm for the reduction of S-frequencies. The dynamic filter makes
it possible to reduce these frequencies without influencing other
spectral parts, and works independent of the signal level.
The critical S-frequencies are different for female and male voices.
Only two basic adjustments are necessary for the de-esser - filter
frequency and the amount of s-reduction (range).
All other parameters which are necessary for effective de-esser
function are controlled by the audio signal itself.
The threshold of the de-esser is automatically set and follows the
signal power level. The reduction of S-frequencies can be controlled
by setting the range parameter from 0...-20dB.
2.3
AUDIO SIGNAL
PROCESSING
2.3.1
GAIN
2.3.2
EXPANDER
fig. 2:
static
characteristics:
expander
2.3.3
DE-ESSER