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PRAESENSA
5.8
Audio processing
On the Audio processing pages, the audio processing parameters of an audio input of a call
station and/or audio outputs of an amplifier in the PRAESENSA system can be set: See:
–
–
The DSP audio equalizers have an internal headroom of 18 dB. Do not use audio equalizer
settings with an accumulated gain of more than 18 dB at any frequency, as this will cause
audio clipping for full scale input signals. It is good practice to do most of the frequency
response corrections by attenuation of prominent frequency bands.
5.8.1
Amplifier
On the Audio processing page of the Amplifier, the audio processing parameters of the
selected amplifier outputs can be set.
–
1.
2.
3.
4.
F: Frequency, G: Gain, Q: Quality factor
Item
High‑pass
filter
Shelving
filter
(for low
frequencies)
Full
parametric
sections (3)
Shelving
filter
(for high
frequencies)
Bosch Security Systems B.V.
Amplifier, page 97
Call station, page 100
For each audio output of the amplifier, a parametric equalizer, an audio delay option and
a volume level selection button is available to set the audio output signal.
Below the Audio processing page, click Amplifier:
–
A new screen appears listed the connected Amplifier(s).
Select and click the Amplifier name to configure.
–
A new screen appears listed the Amplifier outputs.
Select and click the + of the Amplifier output category row:
–
The audio processing / parametric equalizer overview appears.
Select each of the following items, if required.
Filter
Value
Description
Enter F
Default: Frequency 60 Hz, Quality factor 0.7
Select Q
(selectable 0.2 ‑ 2.0).
Fixed: Gain -12 dB/oct.
Enter F
Default: Frequency 500 Hz, Gain 0 dB
Select G
(selectable: -infinite - +12 dB).
Enter F
Default: Frequency 1000 Hz, Quality factor 20.0
Select Q,
(selectable 0.4 ‑ 20.0), Gains 0 dB
G
(selectable: -infinite - +12 dB)
Enter F
Default: Frequency 2000 Hz, Gain 0 dB
Select G
(selectable: -infinite - +12 dB).
Configuration manual
Configure the system | en
2020-09 | V1.20 | PRAESENSA 1.20
97
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