In this tutorial we explore three methods for de-essing vocals in FL Studio using the tools supplied.
Most good de-essers are simply band-limited compressors repackaged and labelled so they can be called a 'de-esser'. So if you have a multi-band compressor, you have a de-esser.
There are two main modes you may want to de-ess in, peaking (a narrow-band) or shelving (starting at a given frequency and upward). Both the Fruity Multiband Compressor and Maximus can operate in either mode. Use the Mid band for peaking or High band for shelving.
We use a multi-band compressor to de-ess because we want to limit the loudness of specific frequencies, usually between 4,000~12,000 Hz. This is where all the 'sibilant' sound energy lies. Further, we only want to compress the sibilant frequencies where they occur. So what's wrong with an EQ? The problem there is that you cut the same frequencies across the whole track and often make it sound dull. Compression, with the correct threshold and ratio settings, cuts the sibilants only when they exceed an acceptable level.
If you want to see the best example of a voiceover that needs some serious de-essing check this YouTube video "Soundproofing / Noise Reduction Tips: Sound Decibels & Frequency by Audimute". Don't you just want to de-ess that one :)