Sibalance
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Sibalance is a De-Esser that uses advanced perceptual loudness and timbre models to detect excess sibilance and harshness. Subsequent reduction is performed by spectral processing, resulting in a cleaner and more transparent result, without the artifacts generated by other de-essers.
Follow the Download link and in FAQs, drop down the tab “Where can I fins older -legacy v3- plug-ins”. The download options will be displayed