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 The Author

Tomislav is a journalist, music producer and web designer from Belgrade, Serbia. He is also the owner and editor-in-chief here at Bedroom Producers Blog.


  1. 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

  2. Clip Shifter by LVC-Audio, Retroband by Michael Kingston, and TubeDriver by Nick Crow are now available on the Mac.

    • Tomislav Zlatic


      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.

  3. 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.

  4. Cant live without ferric, but i am exited about these options :) Thanks again for a killer site.

  5. I keep seeing praise for FerricTDS in many forums, but I don’t know why. Once its output level is matched with that of the input signal, I detect no appreciable difference, even listening through my high quality Beyer DT880 Pro headphones. Furthermore, the same goes for every saturation plugin that I’ve ever tried. I’ve yet to experience one that actually does anything of any worth.

    • Just drive the little input knob and balance it with the saturation knob. If you dial in extreme settings you will know what to listen for and then back it up to taste

  6. Hi, I admit I’m much intrigued by all these magic plugs-in and I’m wondering if there is any sense trying some of them to remaster/manipulate some commercial album.
    Any comment/tips always appreciated.

    Thanks, Jimmy.

  7. I can still use Ferric TDS on Reaper even though it’s 64 bit – it bridges the plugin.