Best Freeware Saturation VST/AU Plugins


It’s common knowledge that high-end analog audio equipment adds that “special something” to the sound. And for those who like keeping things in the box, there’s already a range of costly software emulations available out there.

But thanks to some seriously talented and generous developers, we can actually get pretty close to those expensive sounding results without ever spending a dime. This article list all of the best freeware saturation plugins available at the moment, so if you’re looking for a good free analog tape, tube, or mixing console saturation VST plugin emulation, you’re definitely in the right place! First we’ll take a closer look at the Top 3 picks in this category and then list all of the best freeware tools for saturating your tracks.

#1 FerricTDS by Variety Of Sound (Windows)

FerricTDS by Variety Of Sound.

FerricTDS by Variety Of Sound.

If I had to pick a single plugin from the list below and use that one for the rest of my life, it would certainly be FerricTDS by Variety Of Sound. This plugin is without any doubt my #1 freeware saturation tool. It emulates the effect of tape saturation perfectly and without any unwanted artifacts like noise and flutter. It can also be quite transparent if you want to use it for mastering and it is surprisingly CPU effective.

Some people say that FerricTDS is too subtle, but please note that that you will get more saturation out of it by boosting the volume of the signal on the input (you’ll be close to the sweet spot when that VU meter needle hits the red). Perfect treatment for sampled TR-808 drums! The only real bummer with Ferric TDS is that it will only work on 32-bit Windows. I’ve gone 64-bit a while a go, so I can’t really use my favorite free saturation tool anymore. It sucks, I know.

#2 Nebula3 Free by Acustica (Mac/Win)

Nebula3 Free by Acustica.

Nebula3 Free by Acustica.

But this rather massive setback brings us to my next favorite saturation tool and that is Nebula3 Free. It’s a multi-platform plugin and I regularly use it for saturation and subtle signal coloration in the post-mixing stage. It can also be used in the mix to great effect, but unfortunately it’s a bit too CPU hungry to be a go-to mixing tool for me. The plugin comes with a nice selection of emulated hardware, but you can add all sorts of additional emulations to it, as there are many free Nebula3 programs available online.

#3 SGA1566 by Shattered Glass Audio (Mac/Win)

SGA1566 by Shattered Glass Audio.

SGA1566 by Shattered Glass Audio.

SGA1566 is the absolute best freeware tube preamp emulation out there. Based on precise circuit modeling, the plugin sounds incredibly authentic and is easily among the best tube preamp emulations currently available, free or not. This kind of quality does come at the price of a rather large CPU hit, though. I tend to use SGA1566 in my mixes quite often, but I always freeze it if it’s used as an insert effect. You can use the Low CPU mode and lower oversampling settings to reduce the CPU impact a bit, but that will also reduce the quality of the tube distortion being applied to the signal.

And here is the extended list of free saturation VST/AU plugins:

As always, you are more than welcome to mention your own favorites in the comments section below (in case I’ve missed any good ones). I’m always open for suggestions, but I also try to include only the best freeware plugins in these kinds of articles.

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About Author

Tomislav is a musician and a blogger. He writes about free and affordable music production tools on a daily basis here at Bedroom Producers Blog.


    • bedroom producers blog on

      thanks for the tip! i’ve never heard of these before, will give them a try. which one exactly would you recommend for the article?

  1. Have no idea, cos header – “Tape/Tube/Analog”. But, you put in the list TSClip and Softclamp.
    Anyway, Dist can be used as saturator as well.

      • Great, thanks!! VoS just released Density Mk III, too. As you know, it’s a compressor and I only mention it here because it has the new “color” function which adds stateful saturation.

  2. I used Ferric TDS after reading this. I really loved it. I’ve now been using for over a month. I’ve compared it to other tape machine emulations that cost 150 to 200 dollars. I like it just as much if not better. Thanks for the recommendation. It is now a permanent part of my master output.

    -Rick Saxby,

  3. I am fully aware that VOS Ferric is rightfully recognised as saturation king of the freeware land, BUT I think that Klanghelm IVGI is the new kid on the block.

    It’s has this rich, elegant sound and is so versatile it’s not fair to other free plugs. It’s much more sophisticated and complex than some generic sat/distortion effect IMHO. If I’m not mistaken its suppose te emulate analog mixing desk saturation. And not too mention georgeus GUI.

    And don’t get me wrong, I’m big fan of VOS, I use Trillseeker series (LA,VBL) comps and EpicVerb on every project.Cheers!

  4. I really wish someone would take 1-time and compile it to run as a windows vst. I wish I had the knowledge to do it myself

  5. Yeah I love Softube’s Saturation knob. I use it quite often in my Pro Tools sessions. Also I just want to thank you Sir for this wonderful site. I check it daily to get my plugin and sample fix.

    • Tomislav Zlatic on

      TB TimeMachine is more of a vintage sampler emulation, but good call on TB Ferox! Unfortunately, Ferox used to be free, but it’s not free anymore. I’ll ask the developer if the old version is still available for free download somewhere.

  6. Nasty VCS is SUPERB! Its a complete channel strip, but it has a tube saturation going in. I love the sound and use it to warm up instruments going in to my DAW.

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