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Sonnox is the leading designer of innovative, high quality, award-winning audio processing plug-ins for professional audio engineers. Oxford Plug-Ins are used in an extraordinary range of audio applications including mixing for music production, live sound, broadcast, TV & Film, and even scientific and forensics projects.

The Sonnox design team traces its heritage back to the 1980's, to the development of the legendary Oxford OXF-R3 digital mixing console. With a base price of $1 million, the OXF-R3 was installed in major recording studios worldwide, and became widely accepted as the first 'musical' sounding digital console.

As music production began shifting towards digital workstations, the console inspired a series of unique software developments starting with the Oxford EQ and Dynamics plug-ins.

The expanding family of Oxford Plug-Ins quickly acquired a reputation for excellence among leading engineers worldwide; a reputation that was earned through a no-compromise attitude to audio performance and a desire to push the boundaries with intuitive and novel user interfaces.

Sonnox continues to develop unique, high-quality plug-ins for audio production, embracing new technology and formats with partners such as Avid, Universal Audio and Fraunhofer.

Products by Sonnox

SoftenMixing
by Sonnox
      
MyKVRExclusive with Focusrite hardware

Latest reviews of Sonnox products

VoxDoubler

Reviewed By Sir Hannes [all]
December 15th, 2025
Version reviewed: 2.02.0 on Mac

Quality is there. LogicPro11 on a M1 won't always load sessions VoxDoubler oder Thicker are involved. Must force to quit Logic, try again. Huge latency introduced by them, in 20years only Sonnox do this to my clean system. Last but not least: you need INTERNET connection, which is big big no no cause I am often traveling and working, so I can't load those projects. Why do you do that, Sonnox?

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Oxford SuprEsser

Reviewed By Mictacula AudioSurgeon [all]
August 22nd, 2025
Version reviewed: 4 on Windows

Been wanting to get this for a while, and now that I have, thanks to KVR Audio Marketplace, I couldn't be happier. Another amazing tool in my arsenal..

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VoxDoubler

Reviewed By pa13 [all]
July 21st, 2025
Version reviewed: 1.0 on Mac

Fantastic plugin by Sonnox. Very useful tool, easy to use, accurate and powerful.CPU friendly, fast results.

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Claro

Reviewed By pa13 [all]
July 21st, 2025
Version reviewed: 1.0 on Mac

Excellent EQ, fast and accurate. It gives clarity and professional sound easily. Nice interface, great features. You can solve any problem with it in a minute. So great to use another plugin by Sonnox.

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Oxford Limiter

Reviewed By junkiexxxxl [all]
June 22nd, 2024
Version reviewed: 4 on Windows

Honestly I'm really somehow dissapointed how such a great Plugin doesn't have scaling options, especially at this pricepoint!

(macOS / Windows).

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Oxford Inflator

Reviewed By Roberto_A [all]
July 11th, 2023
Version reviewed: 4.00.0 on Windows

I know lots of professionals use this, I watched a decent amount of videos reviewing it and I got to test it quickly 2 times: this is an amazing little plugin!

The simplicity makes it even better.

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Claro

Reviewed By MarulaMusic [all]
December 6th, 2021
Version reviewed: 1.0 on Windows

This is an inspired plugin. The workflow with Claro is so well thought out that it is now on every channel in all my projects. Shape sound with the simplified mode, all without ever increasing or decreasing your gain, then tweak as needed. The mix page is a real eye opener too and easily allows you to spot conflicting frequencies across your project.

This is right up there with Fabfilter's Pro-Q 3, but I actually find myself more comfortable with Claro. The simplified labeling for frequencies and the fact that all instances are aware of each other when working on mix mode, just make the whole EQíng second nature and feels a little slicker than Pro-Q 3. You're not getting dynamic bands or linear phase filters but then again, those aren't features I use all the time.

This sounds fantastic, feels fantastic and is an absolute pleasure to work with.

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Oxford SuprEsser

Reviewed By tommyzai [all]
July 29th, 2014
Version reviewed: 2.0.2 on Mac

INTRO

Oxford SuprEsser by Sonnox is an amazing tool that helps users identify and correct target specific problem areas of the audio spectrum. As the names suggests, it's particularly good at reducing or eliminating excessive fricatives and sibilant consonants, such as "ch", "s", "sh", "ess", "t", "th", "z", etc. It also excels with cleaning up and softening other sonic artifacts, like harsh cymbal overtones. However, SuprEsser can also be used for removing pops and clicks as well as general compressor duties. The interface makes identifying and eliminating unwanted stuff simple. There is excellent control over the target area and amount of processing — I had no trouble dialing in and getting the desired results.

FAVORITE FEATURES:

  • Scalable interface that is attractive and neatly organized.
  • Easy view simplifies use of basic features while Access view reveals the juicy stuff.
  • Graphics elements are excellent and illustrate exactly what's going on.
  • Auto Level Tracking eliminates the need to adjust the de-essing threshold as the track progresses in real-time.
  • Audio frequency range is selectable.
  • Ability to mix the amount of wet and dry signals being sent to the output.
  • Excellent presets to use as a start point.
  • Convenient preset manager.
  • Three different instances to choose from – regular, low latency and high resolution.
  • Natural sounding.
  • Innovative, responsive developers.

OTHER THOUGHTS:

  • Uses a bit of CPU, but not that much and well worth it.
  • Requires an iLok for authorization, but this is also well worth it.

SUMMARY

The best way to have a track free of excessive sibilant sounds is to perform and record cleanly; however, that's not always possible. That's where this fantastic plugin comes to the rescue. I use it to help speech challenged students hear their annunciation and pronunciation "corrected." It's a wonderful recording tool, and in my case — a wonderful teaching tool. I fully agree with another user who rightfully claims, "SuprEsser is a Swiss army knife of compression and a welcome addition to my plugin folder." I highly recommend SuprEsser to any eMusician, producer, film and game tracker, sound designer, etc., who is looking to reduce or remove unwanted lisping artifacts and other harsh audio without sacrificing wanted dynamics. With SuprEsser, the baby does not get thrown out with the dirty bathwater! Tracks sound as natural as natural can be. Tommy Zai gives SuprEsser two clean, crisp TH-umbs up! Thank you Sonnox, for creating such an amazing audio tool! Fantastic!!.

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