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Win32 Win64    VST
VST rate
3.8 / 5
(12 votes)

Lisp - De-esser
Lisp is a level-independent sibilance processor.

Whether you use a traditional de-esser, sidechained compressor, dynamic EQ, or even edit your tracks manually, cleaning up sibilance problems in your vocals can get pretty tedious. Lisp is new type of de-esser that aims to speed-up this process with its automatic sibilance detection algorithm.

Internally tuned to the human vocal range, Lisp can automatically detect and lower annoying "ss", "teh", and "ch" sounds in your audio by tracking both the amplitude and pitch of its input in real-time. Just set the reduction amount and let Lisp do the rest!

Lisp's internal algorithm doesn't rely on traditional threshold/frequency-based techniques found in most current de-essing systems. Instead, it uses a modified form of the Sleepy-Time Records transient detection algorithm (previously found in the KVR-DC2012 entry: Transient) coupled with fast frequency detection and phase-cancellation methods to remove unwanted sibilance, regardless of the input level. The result is a very natural and pleasing vocal with harsh "s" sounds under control no matter what distance the singer is in relation to the microphone. Not only that, but the entire process is highly CPU efficient, allowing you to use more instances in your project.

(0.7 Mb)
  V 1.0
(0.8 Mb)
  V 1.0


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Dec 08 2018
  3  / 5
It's a good de-esser for most people's voices, but my voice just has such bad S and T's that it can't even get them.

Jun 07 2018
  2  / 5
Really can't make it work with EqualiseAPO 1.2... I can open the control panel and adjust settings and I know it's working because audio is muted when I press the "Listen" button but it does nothing in the way of actually processing the audio. The VU Meter won't even think of moving and I can feel no difference in audio I tried to crank all the sensitivities up but it still does nothing.

Dec 10 2017
  ?  / 5
I've been using Lisp now for several years and it is my go-to de-esser, over a number of others I have including Waves Renaissance De-esser. Highly recommended

Jul 28 2017
  5  / 5
Works fine in Equalizer APO v1.2 / Win 10 x64. Thanks
Sept 18 2017
How did you get it to work with Equalizer APO? I can use Lisp in sony vegas but i can't figure out how to use it with APO :/

Mar 22 2017
  ?  / 5
Having trouble getting Audacity to recognize Lisp in plugins. I'm using Windows 7. Any ideas. Thanks.

Mar 19 2017
  Luis Tamayo
  5  / 5
Wonderful. Absolutely does the job. Also great look with large knobs. Thanks a lot.

Mar 09 2017
  5  / 5
I have used a couple of DeEssers (some I had to pay for). But I like this one the most! You can set the controls very precisely with the mouse scroll wheel and fine tune it with shift+scroll wheel. And your setting values are always clearly visible. In addition you have an exceptional auto mode (optional), a sensitivity, an upper frequency limit for the sibilant reduction and stereo modes. All that is not available by most other DeEssers.

Sept 16 2016
  5  / 5
Amazing tool and very easy to use!

Aug 17 2016
  5  / 5

Dec 01 2015
  ?  / 5
Works great. Could do with little deeper sibilance cut but it's enough for normal vocal track. Great for taming down open hat and cymbals on drums too.

Oct 26 2013
  ?  / 5
Great Interface, lots of scope for specific situations. However though it displays reduction it barely effects the audio, looks like it's doing alot, but behaves like it's doing barely anything. Very much the same with their Transient too. Spitfish is far more effective.

Oct 03 2013
  5  / 5
I've tried many different De-Essers, some free, some not. This is by far the most practical and logical use of one I've seen and used, by far the best. It takes all the features that I've seen in others and basically puts them all in 1 place. You don't need a 200$ De-Esser, this is pristine.
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Aug 17 2013
  Mr Tea
  4  / 5
This is Amazing! Performs/Sounds better than the 'expensive' De-essers. I made this my (Go to) De-esser. Try for your self.