The FB-3100 is a software instrument designed for both Microsoft Windows and Apple macOS platforms, supporting various plugin formats including VST2, VST3, AU, and CLAP. It faithfully recreates the sound and functionality of the classic KORG PS-3100 Polyphonic Synthesizer from 1977. Developed in native C++ code, this instrument delivers high performance with minimal CPU usage, making it suitable for demanding music production environments.

This synthesizer offers an authentic emulation of the original hardware's behavior, featuring band-limited oscillators, classic two-pole lowpass filters, and a resonators section that adds depth to the sound. It also includes two modulation generators and a sample & hold function to provide dynamic modulation options. Additional features such as a paraphonic envelope generator and a semi-modular patch panel enhance sound design possibilities, allowing users to explore complex sonic textures and expressive tones.

Users can take advantage of the micro-tuning option for precise pitch adjustments and various additional tweaks to refine their sound. All parameters are MIDI Learn compatible, enabling comprehensive control via MIDI CC for seamless integration into any setup. The FB-3100 supports both 32-bit and 64-bit systems on Windows and macOS, ensuring broad compatibility for musicians and producers seeking the classic polyphonic synth experience in a modern format.