Yoad Nevo explores the general classic operational modes of de-essing using the Waves DeEsser to manage vocal sibilance and harshness.
In split mode, the de-esser acts like a two-band dynamic EQ, targeting only frequencies above the cutoff point, ideal for controlling sibilance without affecting the entire vocal range.
Bell mode narrows the focus around the cutoff frequency, effectively addressing lower sibilant sounds like "sh" and "ch."
Wideband mode uses the high-frequency detector to trigger full-range compression, suitable for loud, high-pitched vocals, but can risk a "lispy" sound if overdone.