6.3Adjusting Compression Settings
A compressor slightly reduces the dynamic range of a signal. This effect is perceived to quiet loud sounds and boost quiet sounds. A compressor smooths transients. Compressor parameters are set per channel. The Compressor dialog box has LEDs for the input and output signals.
To adjust the compressor settings for a channel:
Step 1On the appliance Web UI’s main page, select DSP.
Step 2Select the Menu button for the channel.
Step 3From the drop-down menu, select Compressor.
Step 4Make desired adjustments using the controls described in Compressor Settings.
Note: If you want to return to the factory settings, select the Reset icon that appears in the right corner.
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Step 5Select Enable to apply the settings to the selected channel.
Table 7, Compressor Settings
Threshold
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Sets the threshold level, which is the point where the signal activates the compressor circuit. The range is -135 to +21 dB.
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Attack
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Sets how fast the compressor turns on when the audio signal passes the threshold level. The range is 1 to 500 ms.
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Hold
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Sets how long the compressor is on after the signal has fallen below the threshold.
The range is 1 to 500 ms.
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Decay
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Sets the rate of turn off of the compressor after the signal is below the threshold.he range is 0 to 2000 ms.
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Knee
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Sets how the compressor reacts to signals once the threshold is reached. Increasing the knee level decreases the obvious transition from the uncompressed to the compressed sound. The range is 1 to 100.
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Ratio
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Sets the compression ratio. For example, if the ration is set for 6 (6:1), the input signal must cross the threshold by 6 dB for the output level to increase by 1 dB. The range is 1 to 100.
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