User Manual

SSL Comp
page 3
3. SSL 4000 Master Bus Compressor Controls and Indicators
1. Threshold sets the operating level for the knee of the compressor. Threshold is
continuously adjustable from -15 dB to +15 dB.
2. Make up Gain compensates for a change in signal level due to compressor activity.
Make up is continuously variable from -5 dB to +15 dB.
3. Attack controls the quickness of the compressor’s response to changes. Six
switchable attack rates: 0.1; 0.3; 1; 3; 10 and 30 ms.
4. The Release time of the master compressor is switchable between 0.1, 0.3, 0.6 and
1.2 seconds, or to automatic. If Auto is selected, the release time is dependent
upon the duration of the program peak.
5. Ratio sets the ratio of signal level to signal gain, i.e., the compression ratio. Ratio
can be switched between 2:1, 4:1 and 10:1.