junger D*AP4 VAP Edition Manual page 59

D*AP4 VAP
Expander
Mode
Mode=Gate
Mode=Expander
Jünger Audio – Expander/Gate
Release profile
Compressor (general parameters)
Compressor Type
Mix Dry...Wet
The Expander can be switched to either working as an Expander or a
Gate. Both modes differ in two parameters:
Fixed reduction ratio of infinite to one. All signals below threshold are
muted. No range available. Hard knee response at threshold.
Selectable reduction ratio of 0:1 up to 0.9:1 with a selectable
maximum reduction of down to -40dB. Soft knee response with a
transition range of 6dB above and below threshold
threshold
soft knee
input
The release profile controls the timing of the closing of the
Gate/Expander. Release profile 0 is a very fast profile and even short
gaps or signal intermissions lead to gain reduction. At the other end of
the scale, 9 is a very slow profile with a relaxed handling of gaps and
low level periods. All profiles feature the same super fast opening
when the signal returns above threshold.
The compressor features two different approaches to dynamic
processing. In Upward mode all signals below reference level are
amplified according to the ratio and range settings, all signals above
reference level are reduced in the same way. This is the 'classic'
approach of earlier Junger Audio compressor designs. The Downward
mode is the more common way of dynamic range compression. Here
all signals above threshold are reduced according to the ratio while all
signals below threshold remain untouched.
In most settings, the full signal is fed to a compressor to achieve a
certain level of gain reduction. Sometimes it is useful to add a portion
of the original, uncompressed signal to the output to restore some
micro dynamics. This technique is called 'parallel compression'. The
ratio of dry (unprocessed) and wet (compressed) signal can be dialed
in with this Mix parameter.
Ratio Expansion ratio from 0:1 (heavy
reduction) up to 0.9:1 (slight reduction). A
ratio of 0.5:1 means that an input level of
1dB below threshold will result in an
output level of 2dB below threshold. In
the same way an input level of 4dB below
threshold results in an output level of 8dB
below threshold and so on.
Range Maximum reduction range. Its value
determines the maximum reduction of the
input signal. This parameter is
sometimes called 'floor', but differs in
terminology. A floor level is defined as an
absolute value in dBFS, no matter where
the threshold is set. Range defines the
relative range of reduction in dB below
threshold and is thus independent from
absolute values.
Threshold Signals below threshold are processed,
signals above pass unaffected. Please be
aware that this is only true in Gate mode,
as the Expander mode features soft knee
characteristics.
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