smart:deess is sonible's content-aware de-esser, part of the smart range of AI-assisted mixing processors. Conventional de-essers require you to locate the offending sibilant range by ear and dial in frequency, threshold, and range settings — a process that varies from voice to voice and take to take. smart:deess instead analyses the material and identifies the sibilance itself, applying reduction where it is needed, which also removes the risk of dulling the whole top end in the process.

The source-adaptive approach makes it practical across different voices in a single session, where a fixed setting on one singer will not suit the next. It suits pop, hip hop, R&B, rock, and voiceover work, and is equally useful on spoken word and podcast material where sibilance is a persistent issue. It sits in a family including smart:chain, smart:comp, smart:lim, smart:reverb, and smart:gate, sharing a consistent workflow philosophy. Like the rest of the range it is available for macOS and Windows in VST, VST3, AU, and AAX formats, supporting sample rates from 44.1 kHz to 192 kHz, with native Apple Silicon support and machine-based or iLok authorization.

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