Prototype Audio has just released Fusion Core, a free analog saturation plugin featuring multiple distortion modes. This VST3 plugin is available for both macOS and Windows users.

What is Fusion Core?

Fusion Core is a streamlined version of Prototype Audio’s full Fusion plugin, which is an analog multi-band saturator. Despite being the “little brother,” Fusion Core still packs plenty of features for those seeking analog warmth in their productions: without any cost.

Key Features of Fusion Core

Fusion Core comes with four analog saturation algorithms, carefully designed to emulate the sound of classic hardware units. These algorithms enhance the detail and texture of your audio, all while preserving the low end and punch of your signal. Prototype Audio promises that this freebie will deliver rich, warm saturation that can add depth and character to any track.

Here’s what you get with Fusion Core:

  • Tube Heat: A soft tube saturation mode with subtle high-gain clipping, ideal for adding warmth.
  • Tape Warmth: Delivers a vintage tape machine sound, adding that unmistakable tape saturation flavor.
  • Wave Designer: Combines dirty wavefolding distortion with a clean saturator for more aggressive tones.
  • Console Character: Brings distortion and high-end fuzz reminiscent of analog mixing consoles.

Simple Interface, Powerful Sound

The plugin sports a minimalist interface, making it easy to dial in the right sound without distraction. The tagline for the plugin is “clean design, dirty sounds,” and it holds true—Fusion Core offers a user-friendly interface with professional-grade results.

How to Download

Getting your hands on Fusion Core is simple. Head to Prototype Audio’s website, enter your email address, and they’ll send you a download link.

Audio Demos

You can find audio examples of the full Fusion plugin on Prototype Audio’s website. These demos will give you a good idea of what Fusion Core is capable of, as the algorithms are shared between both versions – check out the video above too!


If you’re looking to add high-quality analog saturation to your toolbox, Fusion Core is a no-brainer—especially at its unbeatable price point: free!