The Pete Cornish Optical Compressor’s features ensure no change to frequency response, no distortion and the absolute minimum added noise.
Its signal monitoring and gain reduction drive circuits do not pass through the audio circuits and thus cannot degrade the audio performance.
The Blend control allows you to add a small percentage of the original, uncompressed signal to the output.
This is particularly useful when very high compression settings have been dialed in, as a controlled amount of the original attack can still be heard through with the long sustain.