Peavey CEL-2A manual

4.To use as a de-esser‚ engage the side-chain De-ess filter. Set the Attack and Release controls at minimum and the Compressor Ratio to 4:1. Speak or sing a phrase with heavy sibilance (lots of “Ss”) and adjust the Compressor Threshold until 6–9 dB of gain reduction occurs at the peaks. This will get you close to where you need to be. Modify the settings for more or less reduction. If the ratio is too high or the threshold is too low the compression may be exaggerated‚ causing the material to drop excessively in volume (duck) during sibilance.

5.When heavy bass or low frequency noise causes the compressor to drop levels unnecessarily‚ the side-chain Low-cut filter can be used. When activated‚ the Compressor Threshold should be reset since a large portion of the signal usually contains low frequency components. The bass will have less affect on the compressor and the signal will sound more natural. If the source contains only bass frequencies‚ this may prevent the compressor from working at all and the bass will pass through unchanged.

6.After all the settings are made‚ adjust the Gain control for a 0 dBu (or +4 dBu) average on the output meter.

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