Dynamic Filter; Dither - junger Accent1 Operation Manual

2. FUNCTION DESCRIPTION
2.3.6
In dynamic mode the filter activity is controlled
by the audio level. The filter get active only if
the level of incoming audio signal reaches a
defined threshold level. A typical application for
a dynamic filter is the de-esser function.
There are two basic modes for the dynamic
equaliser, dependent on adjusted RANGE
value.
Negative values for RANGE (cut function)
switches into REDUCE mode. In REDUCE
mode signals will be reduced if their level is
higher as the threshold level.
REDUCE MODE
ENHANCE MODE
2.3.7
The digital output signal has a word length of
24 bit. The information of a 24 bits signal is not
more storable linear in most cases. One must
shorten 24 bits data word to 20 or 16 bit word
length.
In order to receive a better sound quality
during cut down the data to 20 or 16 bit, one
must redither the material. This is done by
calculating random numbers (dither signal) and
page 2-6 operation manual accent2, chapter 2 -Function description-
level
RANGE value negative (cut)
level
RANGE value positive (boost)

DYNAMIC FILTER

All spectral parts of the signal (selected by the
filter band) which has more level as the
adjusted threshold level will be reduced by the
RANGE value. The level reduction never
comes below the threshold level.
Positive values for RANGE (boost function)
switches into ENHANCE mode. In ENHANCE
mode signals will be increased (or enhanced) if
their level is below the threshold level.
All spectral parts of the signal (selected by the
filter band) which have less level as the
adjusted threshold level will be increased by
the RANGE value. The increased level never
comes over the threshold level.
frequency
threshold
frequency
threshold
add a random number to every sample. Then it
will be cut off to 16 bit. As a result, the bit with
least weight (LSB) is put in such a way that it
corresponds best to the information of the last
bits following available ones no more and
makes less distortions as hissing in the signal.
Dither is switched off for digital zero signals
(auto-blacking).

DITHER