SMOOTH is a very interesting professional resonance suppressor for macOS and Windows with many usefull functions and a highly intuitive interface with a lot going on under the hood. It's M/S capabilities turned out to be very effective in precisely smoothing out harsh resonances from center-panned sources, a feature I was missing in many other resonance suppressors. Mid and side can be processed fully independent, which makes KERN-SMOOTH an ideal tool for mix & mastering purposes.
Response from kernaudioio from KERN audio on March 27th, 2026
thank you so much for the detailed review. the M/S processing was one of the things i spent the most time on during development, so hearing it's filling a gap for you is really satisfying. mastering use cases like that are exactly what i had in mind.
will keep on updating and improving, thanks mate.
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