It’s too good to be free.
(But it is.)



  • Three modes, three kinds of distortion character​
  • Great for fattening up drums and bass, adding harmonics to vocals, and more
  • Three versions included: Saturation Knob native plug-in, Saturation Knob for Modular, and Saturation Knob for Amp Room


Modular Ready / Effects / Amp Room Ready

Saturation Knob


Now you can get Saturation Knob free in Softube Central.
Make sure you create or log in to your account and download Softube Central.​


The free plug-in Saturation Knob is a modeled output distortion that can be used anywhere you need some grit.

Use it to fatten up bass lines, add some harmonics and shimmer to vocals, or simply destroy your drum loop.


"My response when they told me the Saturation Knob is a free plug-in was — are you nuts? Seriously? It's too good to be free! I use it to make guitars fatter and more aggressive, snares naturally brighter, kicks punchier, vocals warmer. Basically, it's good on just about anything. Saturation Knob should be renamed Attitude Adjuster! If a plugin can be addicting, the Saturation Knob is it!"

Michael Brauer
Seven Grammy awards, Rolling Stones, Bob Dylan, Paul McCartney, Coldplay

One Big Knob and a Little Switch

The three modes—Keep High, Neutral and Keep Low—give you three kinds of characters of distortion. If you want to squash a drum loop but keep the bass drum fairly intact, you can, for example, use the Keep Low mode, while Keep High distorts the low end more, keeping the high frequencies relatively clean.


Yes, It's Free

Get Saturation Knob for free and add a taste of warm, analog saturation to your mixes.


What's Included

Saturation Knob native plug-in

With Saturation Knob, you can fatten up bass lines, add shimmer to vocals, or totally demolish your drum loop. It is the perfect plug-in to grab when you need some grit. (And it's free.)

Saturation Knob for Modular

Saturation Knob for Modular, our virtual Eurorack platform, helps you create sensational synth sounds. Virtually patch it to modules from Doepfer, Buchla, Intellijel, and more to discover new sonic spheres.

learn more about modular

Saturation Knob for Amp Room

Saturation Knob for Amp Room, our pro audio guitar and bass platform, is addictive fun. Combine it with other studio effects, classic amps, cabs, and pedals to easily create studio-quality, record-ready tones.


This product supports
Extended Features

We love VU meters, Bakelite knobs, and analog quirks. But we want modern precision and workflow. The answer? Softube Extended Features. Easy-access panels with the innovations you need close at hand


Learn more


Modular Ready

This plug-in can be used within Modular, our Eurorack platform. Click to learn more.

In short


  • Download for free
  • Three modes: Keep High, Neutral, and Keep Low
  • Great for fattening up drums and bass, adding harmonics to vocals, and more
  • Modeled output distortion
  • Modular Ready: works as a native plug-in and as a module in Modular, Softube's Eurorack platform. Learn more about Modular


  • System requirements

    • Monterey 12, Ventura 13, Sonoma 14
    • Windows 10 (64-bit), Windows 11
    • Softube account
    • iLok account
    • Computer with AU, VST, VST3 and/or AAX compatible DAW host software
    • Internet access (for downloading installers and managing licenses)

    Read full System Requirements and our Terms and Conditions 

Can't find what you are looking for? Support