Proel PRONET v.2.1 - Manual (Page 57)

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7.1.3 Compressor - limiter
Fig.74 Input compressor: parameters and visualization.
This dynamic processor on the input signal can work as a compressor (“Compressor Mode”) or as a limiter
(“Limiter Mode”). When the compressor is working the reduction meter display the amount of reduction.
Threshold
Threshold level for the compressor/limiter. Below the threshold no compression/limiting occurs, above the
threshold the processors starts to compress or to limit the signal. The threshold level is referred to the
maximum dynamic for the input signal, so Thresh=0dB means “threshold disabled (over the maximum signal
level)”.
Attack Time
Attack time for the compressor: determines how quickly the compressor reacts to signals above the
threshold.
Release Time
Release time for the compressor: determines how quickly the compressor restores its normal gain after the
signal goes below the threshold.
Limit
Enables or disables the “Limiter Mode”: enabling this mode the compressor acts as a limiter (with a ratio ∞:1).
Ratio
Selects the amount of compression for the signal. Compression ratio parameter determines the input/output
ratio for signals above the threshold: for example, a 5:1 ratio means that a signal exceeding the threshold by
5 dB will compressed to 1 dB above the threshold. This parameter is not available in “Limiter Mode”.
Reduction Meter
LED meter to check when and how much the compressor/limiter is reducing the audio signal that it is
processing. It works only when compressor is enabled.