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3. Click the Off button
4. Define the following:
▪
Threshold – Decreases the volume of audio signals that are below the threshold
level.
▪
Attack Time – Sets the response speed of the expander to signal levels above the
threshold.
Release – Sets the response speed of the expander to signal levels below the
▪
threshold.
5. Open the Ratio drop-down box to set the extent to which the volume is decreased.
The higher the ratio the more the audio level below the threshold is lowered.
The Expansion (dB) indicates the amount of expansion in a dB scale.
Expander settings are adjusted.
Using HPF (High Pass Filter) Module
A High Pass Filter passes signals that are higher than a certain cut-off frequency.
Frequencies under the cut-off frequency are attenuated. Use the HPF module to cut off low
frequencies and let higher frequencies pass.
To adjust the HPF:
1. In the Navigation pane, click DSP. The DSP (Main) page appears.
2. Click HPF. The button turns light orange and the High Pass Filter module page appears.
The left side shows the input volume slider.
AFM-20DSP – Processing Audio Signals
. The Exp module turns on
Figure 28: Processing View – Expander Module
Kramer Electronics Ltd.
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28
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