HoRNet Sybilla

Sybilla 1.4.0 is available, this update is free for owners of the plugin and includes:

  • Added support for Apple Silicon M1
  • Fixed interface being too small on high dpi monitor on windows

Say goodbye to sibilant sounds…

Sybilla is an intelligent de-esser designed with one purpose: reduce those sibilant in almost no time.
It works dividing the input signal in 8 different bands carefully tuned to the sibilant sound frequencies, the output of these filters drive a VCA modeled compressor that has a smooth and pleasant response. This coupled with envelope followers “perfect for speech” gives Sybilla a very musical sound but effective de-essing.

Simple but effective

Sybilla has just two knobs, since the frequency detection is done automatically to always catch the most critical part you only have to decide how much the de-esser should work on those frequencies and if you like some of the original signal mixed in.
That’s it. Sybilla is easy and effective de-essing.


The demo is fully functional except for the fact that every now and then it will silence out, you cannot save parameter values with your session and the plugin will not respond to automation coming from the host.


  • Automatic de-essing
  • adjustable effect amount
  • 8 different detection filters
  • on/off switches for each of the 8 filters
  • effective de-essing regardless of signal level
  • dry/wet knob
  • macOS X (>=10.11) and Windows (Vista and later) support
  • Apple Silicon native support (except for AAX)
  • 64bit only both on Mac and Windows
  • Audio Units VST2.4, VST3 and AAX format

Copy protection

The HoRNet Sybilla has no copy protection, we don’t believe in copy protection, they are always cracked and they are annoying for the users, we all know you are not going to give away the plugin on the internet…

So simply download the plugin and enjoy your recordings!

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7 thoughts on “HoRNet Sybilla

Chris3333 says:

This toll is faster and better than me

AudioKemestry | AK Mastering says:

Came across Sybilla in the Mixing and Mastering FB group and decided to give it a try…..and I'm very impressed. I have all the top de-essers, from Weiss to DMG Essence to Sonnox to Soothe….and while Sybilla doesnt have as many features as those or an amazing GUI….it holds it's own sonically and it just works. Definitely one of my new go-to deesser plugins for speed and simplicity. Great work!

stayupjunie says:

Great plugins

harvey says:

gracias por su calidad y esftuerzo en productos de calidad como este

Simon Giles says:

This is a great de-esser and sooooo easy to use! Thanks for making such great tools!

Roland says:

I've done shootout after shootout with other software de-essers I own. De-essing is my personal audio fetish, since I am a very sibilant male singer. This little plugin with its utilitarian interface is simply the most musical/natural sounding software de-esser I own. It has found into every vocal track for the past few years.

Spedup says:

This is an exceptionally good de-esser. It's sufficiently flexible to deal with almost anything but also really easy to use. The results sound very natural – none of the horrible 'lisp' effect that other de-essers seem to give. Just a few controls make it easy to get the job done quickly. Don't be fooled by the price, this is a professional tool. Ten out of Ten!

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