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D*AP4 VAP
Detector Weighting
Full Range
Proximity
Loudness
Low Level Behavior
Processing Threshold
Below Threshold Mode
Leveler Hold
[Full Range / Proximity / Loudness]
The Leveler features a Side Chain Filter with special characteristics to
adapt the leveling process to three major applications.
The Side Chain is not filtered and the Leveler is running on full
bandwidth detection.
The Side Chain uses a low shelf filter to compensate for microphone
proximity effects.
In modern broadcast production environments the final product is
played out in accordance with current loudness standards. Those
standards and recommended practices always refer to the output
signal and do not consider the condition of the source channels. This
is correct, but never the less, it can be very useful to consider
loudness for these single channels. With this loudness filtering you can
bring the output to a consistent level, based on modern loudness
recommendations. The output will integrate seamlessly into your
loudness normalized product. In many situations, no additional
loudness correction is necessary. This approach is compatible with all
international loudness recommendations.
Technical remark: K-Filtering is used as described in
ITU-R BS 1770-3.
[-80 ... -70 ... -20]
[Release / Hold]
In continuous operation the 'Below Threshold Mode' should remain in
'Release'. In this case the dynamic gain slowly returns to its neutral
state in case of signal absence. In this mode a returning signal would
start a new processing period with its lead in attack time. This can be
undesired. In those cases setting the 'Below Threshold Mode' to 'hold'
will pause the dynamic processing at the last value until the signal
returns. Returning signals are treated just like continuous signals. This
function has some similarities to the 'Freeze Level' but works with a
different designation as it is meant to keep processing fluent over
signal loss.
[Normal / Hold]
Leveler Hold freezes the levelers dynamic gain and preserve its
current state, for as long as the hold function is activated. This can be
useful for example to prevent loud sounds like sneezing or coughing
from causing leveler action.
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