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 FB-3100 by Full Bucket Music is a Virtual Instrument Audio Plugin. It functions as a VST Plugin and an Audio Units Plugin.
Product FB-3100
Developer Full Bucket Music
Price (MSRP)
Type / Tags Synth (Analogue / Subtractive)Synth (Semi Modular)
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
  Download Released
  Download Released
Audio Demos
Miscellaneous Information
Copy ProtectionNone

The FB-3100 is a software instrument for Microsoft Windows (VST) and Apple macOS (VST/AU) simulating the KORG PS-3100 Polyphonic Synthesizer from 1977. It is written in native C++ code for high performance and low CPU consumption. Main features are:

  • Close emulation of behavior and all controls of the original hardware.
  • Band-limited oscillators, classic two-pole lowpass filters.
  • Resonators section.
  • Two Modulation Generators, Sample & Hold.
  • Additional paraphonic Envelope Generator.
  • Semi-modular patch panel.
  • Micro-tuning option.
  • Additional tweaks.
  • MIDI Learn – all parameters can be controlled by MIDI CC.
  • Plug-in supports Windows and macOS (32-bit and 64-bit).


Latest User Reviews Average user rating of 0.00 from 0 reviews


Discussion: Active
13 July 2017 at 6:36pm

Woah ! It was one of my dreams ! A cosmic thank you, Bjorn.


14 July 2017 at 7:56am

The keyboard balance feature is the one I told about your other synth. You should add keyboard balance feature to all your synths.

14 July 2017 at 1:01pm

- every new work by Full Bucket is a must try for me;
- this audio demo is just marvelous. :)

23 July 2017 at 10:07am

As polyphony goes up, eats up CPU pretty quick (my machine is old though).

Sound? Fullbucket has trademark sound. Its punchy, but somewhat lacks definition. This plugin is a refinement of that sound. It suits microtonal abilities, organ-like structure, hyper-polyphony. Nice tool, and probably best work of Bjorn yet.

11 September 2017 at 11:59am

Awesome to see the mac port... I don't like to use software that isn't cross platform, In this day it doesn't pay to get locked into any ecosystem... So this is really great. I hope theres more to come from the full bucket catalog.

Thanks for this one :)

6 January 2020 at 11:29am

This is a really great synth and all for free. I'm new to softsynths and I'd like to know how to save new patches so that they appear in the Program Name box. I want to modify an existing patch then save it in an unused memory slot. But the only ways seem to be to overwrite an existing patch or to save it as a Preset in a folder on my hard drive - but this Preset doesn't appear in the Program Name box, even when I load it back in. How should I be working with patches and presets? I'm confused.

7 January 2020 at 12:57am

With almost all the plugins the easiest way to make personal banks is this:

  1. In your Windows Explorer or OS X Finder, make a copy of a fxb bank file. Then name it as you want ("perso01.fxb" for example).
  2. Load your "perso01.fxb" in the plugin.
  3. Then from now on you can do whatever you want in this "perso01.fxb" bank. You are sure to not alter any preset in any other bank since that "perso01.fxb" bank is yours.

A good tip is to create that way your own "Perso_Init.fxb" bank. You make as above, then in ALL THE SLOTS you put a preset that you consider as a good init state. Once it is done (the same personal "Init" preset saved in each one of all the slots) just save the bank again from the plugin (or from the DAW) so that on your disk drive your "Perso_Init.fxb" file contains now only that same "Init" presets in all its slots. Now the situation is very clear : each time you want to create a brand new personal bank, just duplicate that "Perso_Init.fxb" under a new name at your convenience ("MyPads.fxb" for examples), leaving your "Perso_Init.fxb" bank file definitively untouched. And that's all for the creation of a new bank dedicated to personal pads.

Now let's see the creation of a new pad preset : when you want to work on the creation of a new personal pad for example, load that "MyPads.fxb" in the plugin, create your new pad patch, save it in the next free slot of that "MyPads" bank, save the bank again from the plugin of from the DAW, and all is done for that new patch.

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