Audio DSP with AEC, 4-in/4-out analog, 4-in/4-out Dante and USB
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3.3.2 Expander
The expander will reduce the signal level by the selected ratio when the signal goes below the threshold.
Fig.3.2 Expander The
expander has the following control parameters:
Threshold:
The expander is active when the signal goes below this threshold.
Ratio:
Refers to the slope below the threshold point on the gain curve. Higher ratio results in more attenuation below threshold
Attack time:
Refers to the time required to activate the expander when the signal falls below the threshold.
Release time:
Refers to the time required for the gain to be restored when signal is above the threshold.
3.3.3 Compressor & Limiter
Compressor
The compressor is used to reduce the dynamic range of the signal higher than the threshold and maintaining the dynamic range
of the signal below the threshold.
The compressor has the following control parameters:
Threshold:
The compressor is active when the signal goes above this threshold.
Ratio:
Refers to the compression ratio. The ratio sets the degree of gain reduction when the signal is above the threshold level.
The adjustable range of compression ratio is 1-20.
