Free Tonmann DeEsser VST plugin

Update: I just finished the work on version 1.2, which I now offer as a free download below.
This version brings an all new „decent“ GUI, kindly created by DeLaMancha (, the de-normal and multicore-problems are (hopefully) fixed. Also a few other internal improvements are addressed in this release.

A screenshot of the current version (loaded in Sonar):

Here’s a little description taken from the included user manual:


Tonmann DeEsser is a basic high frequency dynamic processor VST plugin, called a DeEsser
because it’s mainly designed to get rid of „stinging“ sibilants that may occur on vocals after
compression or adding a high boost.
It may be used with any host software that can load and use VST2.4/32bit-compatible plugins,
tested by the author are Cakewalk Sonar (4, 7), Sony Sound Forge (9) and DirectiXer (2.5).
It should work in 64bit hosts using a “bitbridge”, but this is untested by the author.
User-feedback about compatibility (or not) with other host softwares is welcome and very
The plugin has been carefully designed to suppress any artificial or alienated sound that may arise
under awkward situations with some other (even some hardware) DeEssers.


• True independent stereo operation, but also runs in mono mode
• Wideband and lowpass reduction modes selectable
• Fully adjustable center frequency and bandwidth of the detection range
• Adjustable detection threshold to retain the “crisp” sound character of a vocal
• Look ahead feature for sibilants with short and sharp attacks
• Adjustable release time
• Wide-ranging adjustable attenuation for being able to use it before or after a compressor, just like you prefer
• „What you remove“ listen mode, one actually hears what’s going to be suppressed
• Two level readouts for optical supervision

There’s a small tutorial on YouTube about vocal processing that features my deesser. 🙂

Download most recent version (v1.2, ~ 1.6 MB, 7z archive)

If you experience a problem with this plugin in your host software, please try if the former release works for you:

Download former version (v1.1, ~ 1 MB, rar archive)

If you like this plugin and use it a lot, please consider a making a small donation of any value you want. Many thanks for your contribution! 🙂

33 Kommentare

  1. Pingback: Free DeEsser by Tonmann

  2. Howard Ellison

    Hello Chris. Looks perfect, but will this work on a Mac? Mine is a 10.8.6 Lion, and all I get is ‚cannot open in DOS mode‘

    1. chris (Beitrag Autor)

      Hi Howard,
      I’m afraid this won’t work out of the box, since it’s a Windows-only VST-plugin. But I found some info in the net about running Windows VST-plugins on Mac OS:
      Hope that helps.

  3. Petr

    Thank you

    1. chris (Beitrag Autor)

      You’re welcome! 🙂

  4. Pingback: Deesser Download Free – Information

  5. François

    Hi your plug looks great
    I’ve test the 2 versions.
    i work on cubase 7.5 / win10 and it’s work but when
    i re-open the same project (with the deesser), the sound dissapear on all the tracks and Cubase
    can’t exit normaly

    I hope you could find the solution

    Best regards

    1. chris (Beitrag Autor)

      Hi Francios,
      sorry to hear that the plugin doesn’t work for you.
      I’m afraid I can’t support you directly, but the current trial version of Cubase do not work on my old machine 🙁
      However, I will ask in the Synthedit-developer mailinglist if there’s a known problem with SE-plugins and Cubase on Windows 10.
      Let‘ see…

      best regards,

  6. Phil Mayes

    Works fine on 64-bit Reaper on Windows 10. Thanks!

    1. chris (Beitrag Autor)

      Hi Phil,
      thanks for the feedback! 🙂

  7. William

    Hi Christian

    Thanks for putting the DeEsser online. I wonder if you could help me with a question…

    I am a total newbie with this, I don’t have any sound engineering experience. All I want to do is apply it to a spoken track (my own) and knock back some of the sibilants so they don’t sound so sharp.

    Could you suggest a standard set of settings that I can use with the plugin? I don’t really have the expertise to adjust it each time, I’m just looking for something that will do a quick cleanup.

    Thanks in advance

    1. chris (Beitrag Autor)

      Hi William,

      did you check the included PDF-manual yet? There’s some short how-to starting at page 3.
      If you really need a faster solution, select a preset that fits your setup (sex of speaker, type of microphone) and adjust the „ATTEN.“-knob while the audio is running. If the speaker starts to lisp, turn the knob a bit counter-clockwise again.
      When you’ve found a setup that sounds good to your ears, simply save it as a new preset so you can re-use it the next time without having to tune the settings from the scratch again.
      Hope that helps. If not, let me know!

  8. Miguel

    Hi Chris
    I have downloaded the plugin three times but I am not able to open it I dont know why.

    1. chris (Beitrag Autor)

      Hi Miguel,
      what do you mean by „not able to open it“? Can’t you just unpack the 7zip archive or do you get stuck in how to use it?

      1. Petik András

        At the first glance I enjoy this plugin (Cubase 5 studio, 64 bit, Win7) as I could install the 1.1 version. The extension of „7z“ is unknown for me so I could not install the 1.2 version. How can I open this file? (I would use the newer version…)
        Best regards

        1. chris (Beitrag Autor)

          Hi András,

          7z is the file extension used by the 7zip archiver. You can freely download it here:


  9. Bent Kristensen

    I have downloaded the Deesser, but it is a 32 bit plugin, so I cannot use it.
    I’m using Windows 10 and Presonus Studio One and it is 64 bits. Do you have the deesser in 64 bits?

    1. chris (Beitrag Autor)

      Hi Bent,
      I’m sorry but there is no 64bit version (yet). Have you tried running it in a 32/64bit wrapper like jbridge yet? (

  10. Gabriel

    Hello! Thank you very much for this. Worked like a charm on Vegas 13, reduced 6dB of high noises without cutting the middle frequencies and killing the vocal line. It`s still clipping, but enough for me to master properly.

    1. chris (Beitrag Autor)

      Hi Gabriel,
      thanks for the positive feedback! 🙂

  11. RJ

    Hi i like this plugin alot, is there any email where i can have a private talk? thanks

    1. chris (Beitrag Autor)

      Hi RJ,
      thanks, that’s nice to hear. May I ask about what you’d like to talk privately?

      1. RJ

        At a second thought, it was just small things i shouldn’t need to bother you at the first place, sorry. Please just remove my comments if you want. Thanks for your reply.

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    Interessante Page. Das Design und die nuetzlichen Infos
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    1. chris (Beitrag Autor)

      Vielen Dank!

  13. Greg Thomas

    The de-esser works wonderfully in my old Adobe Audition 1.5 program, but the new Adobe Audition CC won’t recognize it as a plug in, even when I instruct it to search on the file folder where the plug-in is located. Is there something that can be done so I don’t have to use 2 different programs to process my audio?

    1. chris (Beitrag Autor)

      Hi Greg,

      the reason is, that CC does not support 32 bit plugins any more. Since my De-Esser is still 32 bit, you need some „bridge“ to make 64 bit hosts work with 32 bit plugins again.
      Here’s a nice write-up about this topic on the Adobe CC blog:


  14. Paulo Cordeiro

    I have the cubase LE AL 8, when open the program don’t appear the Deesser!

    Where i can find the Deesser in cubase?



  15. Manuel

    Hallo, habe gerade versucht deinen De-Esser in Audacity 2.2.2 (Win10) zu installieren und kriege danach beim öffnen viele Meldungen über nicht gefundene Dateien…



    Can’t load SE Plugin: Das angegebene Modul wurde nicht gefunden.
    File: C:\…\Audacity\Plug-Ins\TonmannDeEsser\Converters.sem

    und noch ca 15 weitere fehlende sem-Dateien…Wie lässt sich das beheben? Im Installations-Download war nur die dll-Datei und das PDF.

    1. chris (Beitrag Autor)

      Hallo Manuel,

      ich habe mir Audacity 2.2.2 gerade mal angesehen. Dort werden ca. 50% meiner VST-Plugins nicht mehr richtig geladen, vermutlich ein Fehler in Audacity.
      Ich werde das Problem mal näher untersuchen.

      1. chris (Beitrag Autor)

        Nachdem ich Audacity 2.2.2 nochmal komplett deinstalliert habe und diesmal beim Installieren die Einstellungen zurückgesetzt habe, läuft es ohne Probleme. Auch die anderen Plugins funktionieren nun wieder.
        Scheint so, als hat AC Probleme damit die eigenen Einstellungen bei einem Versionsupgrade korrekt zu übernehmen?!
        Hier ein Screenshot als Beweis 😉

        NACHTRAG: Bei vielen VST-Plugins fehlen in der 2.2.2 sämtliche Presets… Ich glaube ich wechsle doch wieder zur 2.0.3. :-/

  16. Donald

    The pages to both versions don’t load–they load as…

    1. chris (Beitrag Autor)

      Hi Donald,
      for me, both links work here. I just tried with Firefox, Chrome and Edge.
      Do you use any browser-addon that removes/suppressed the referer-page? If so, this could be the reason for the download to fail.
      Please temporarly disable this addon/function and the download should work as expected.


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