TesslaPRO mkIII released

the magic is where the transient happens

The Tessla audio plugin series once started as a reminiscence to classic transformer based circuit designs of the 50s and 60s but without just being a clone stuck in the past. The PRO version has been made for mixing and mastering engineers working in the digital domain but always missing that extra vibe delivered by some highend analog devices.

TesslaPRO brings back the subtle artifacts from the analog right into the digital domain. It sligthly colors the sound, polishes transients and creates depth and dimension in the stereo field to get that cohesive sound we’re after. All the analog goodness in subtle doses: It’s a mixing effect intended to be used here and there, wherever the mix demands it.

The mkIII version is a technical redesign, further refined to capture all those sonic details while reducing audible distortions at the same time. It further blurs the line between compression and saturation and also takes aural perception based effects into account.

Available for Windows VST in 32 and 64bit as freeware. Download your copy here.


  1. Thank you so much for your brilliant work! I use your plugins almost on every channel.

  2. My word this one subtle Herb, even for you!
    Best description is “expensive” haha.
    gets that transformer depth and sheen with a gentle bring up of inner details like reverb tails etc. I can hear some transient psycho acoustic trickery at the top which seems more obvious in the side channel, really good as a ‘3d’ enhancer if the material allows (or should that be 4d??? given your working with time based states if i understand correctly)
    not sure what’s going on at the low end but it an do that thing that some tapes do where it add definition through harmonics but doesn’t actually get muddier so I’m presuming that’s heavily dynamic behaviour too.

    Tessla SE II is still going to be my go-to I think or instant gratification but when I need finer control I think this is perfect.

  3. One suggestion would be to allow the knobs to be turned by the mouse wheel.

  4. One more gentle warm plugin by You. Deeply Thankful to your work. Respect once again.

  5. audiophoria says:

    Thanks for the update! FYI, when I downloaded it, Chrome gave the warning: “Can’t be downloaded safely”. I was able to bypass this but I thought you might want to take a look at this.

  6. Request: TesslaPRO mkIII & Density Density mkII aon *macOS.. Please!! Thanks!

  7. Amazing plugins and very generous for free. Are you planning on releasing any of your updated plugins as VST3 and if so, any idea of when the first ones will be out?

  8. Thank you very much Bootsy…. Warm regards.

  9. Tor KrΓΈvel-Velle says:

    I have only briefly tried this on a couple of drumbuses (both electronic and acoustic). It is subtle, but still it just makes the buses come more alive. Almost inaudible when the bus is soloed. When the drums play with the rest of the tracks? Better, MUCH better. But how? Don’t know, but I guess this will live on a lot of my buses from now on. Just one question: Where in a typical signal chain would it fit the best? So far i but it in the start of the bus chain, before compression and EQ. Should it be the other way around?

    • I think thats ok!

    • Do whatever sounds best in context.
      Given this is a transient sensitive device I would usually put it before compression unless it’s the kind of late attack compression that’s enhancing transients also.
      Eq same reasoning, do you want to apply enhancement to the high and low harmonics after they are changed by eq or before. It all depends no right or wrong answer just play and learn.

  10. Oh wow πŸ™‚
    The Mk2 Version is in all my Mastering Chains.
    For the last months I have been putting Airwindows Hypersonic in front of it to reduce Aliasing risks. So, does the Mk3 version more Oversampling?

  11. Hey there, i absolutely love using the Rescue MK2 and wanted to upgrade it to 64 bit, but sadly i just saw it’s been discontinued. Which one of your Plugins should i use as an alternative? Big big thanks for your amazing work!


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  3. […] TesslaPRO, so be sure to grab the update!TesslaPRO mkIII is a VST plug-in for Windows (32/64 bit).Get TesslaPRO mkIII hereBy loading the video, you agree to YouTube’s privacy policy.Learn moreLoad […]

  4. […] TesslaPRO, so be sure to grab the update!TesslaPRO mkIII is a VST plug-in for Windows (32/64 bit).Get TesslaPRO mkIII hereBy loading the video, you agree to YouTube’s privacy policy.Learn moreLoad […]

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