2. FUNCTION DESCRIPTION
AUDIO SIGNAL PROCESSING
2.3
All signal processing is done in the digital
domain by 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.
It is possible to choose different programs
for the Limiter and for the compressor. Each
program provides ideal dynamics control for
a different kind of programme signal
Selecting a particular program PRO 0...9 sets
up the optimum parameters of the dynamics
processor (attack and release times,
threshold levels and interactions between the
multiple signal dependent control circuits) for a
particular kind of programme material.
(In order to understand the basic Multi-loop
principle of the Jünger Audio dynamics
processors please refer to chapter 6.1, for
more information regarding control programs
read 6.3).
GAIN
2.3.1
GAIN means linear amplification of input
signals. The gain can be changed in steps of
0.1 dB , within a range from -15...+15 dB. Gain
amplification is done between compressor and
limiter processing.
The GAIN menu is opened by pressing the
GAIN button.
COMPRESSOR
2.3.2
The compression of the programme signal
takes place evenly over the entire input level
range and not only at the upper end above a
certain threshold level. Dynamic structures of
the input signal (e.g. dynamic evolutions) are
converted proportionally so that even after
compression the ratios are maintained, only
slightly condensed, leaving on the whole a
transparent, seemingly uncompressed sound
impression.
Compression (reduction of the dynamic range
of the input signal to match the dynamic
range of the storage or of the transmission
system) is partly achieved by increasing the
level of low level signals.
The lower the input signal level the higher
the additional gain applied to that input signal
by the compression processing will be.
Independent of the compression ratio , the
gain of the compressor (range) can be
limited (maximum 1 dB to 15dB), so that
there should be no inadmissible increase of
background noises during signal pauses (e.g.
live atmos, air-conditioning, hum and noise).
2.0:1
1.6:1
1.3:1
OFF
ratio
-50
-40
-30
-20
-10
[dBFS]
-10
-20
-30
-40
-50
-60
output
input
range
max. 15dB
fig. 2-1:
static characteristics:
compressor
operation manual accent2, chapter 2 -Function description- page 2-3