FB3 – v1.1.1 [02-Oct-2026]

Watch Espen Kraft's demo
of the FB3 Beta version
at YouTube:

Watch Kraftraum's demo
at YouTube:

FB3 is a software instrument for Microsoft Windows (VST2/VST3/CLAP/AAX) and Apple macOS (VST2/VST3/CLAP/AU/AAX) simulating the classic Kawai K3/K3m synthesizer from 1986. It is written in native C++ code for high performance and low CPU consumption. Main features are:

• Simulation of the original wave generator unit
• Original factory sounds
• Additional sounds by Eric Väpnargård
• Up to 64 voices polyphony
• User interface can be used to edit the original K3/K3m units
• SysEx and User Wave import and export
• Resizable user interface (not "N" version!)
• Supports MTS-ESP by ODDSound dynamic micro-tuning
• MIDI Learn – all parameters can be controlled by MIDI CC
• Plug-in supports Windows and macOS (32 bit and 64 bit)
• No AI tools were used, except for a few stylistic improvements to the English in the manual

Special credits go to:

• Espen Kraft for help, Beta testing, and promotion.
• Kraftraum for Beta testing and support.
• Scott Nordlund aka acreil for deciphering the K3 wave generator.
• Eric Väpnargård for his support.

Learn how to install FB3 on your Mac!

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