8.2Great
Full Bucket FB3 is a free plugin emulation of the 1986 Kawai K3 hybrid synth, with a drawable additive user wave, an analog-style filter, 64-voice polyphony, and Kawai K3 SysEx patch import.
Plugin comparison
Full Bucket FB3 vs Full Bucket Matriq-Six
Specs, price and the Dubspot Score, side by side — with our verdict on which synth to buy.
Independent score / workflow fit / buying signal
Contenders
The side-by-side
7.2Good
Matriq-Six is a free Oberheim Matrix-6R emulation from Full Bucket Music, modeling the original 6809 CPU and ROM with 6-voice polyphony and SysEx patch import.
Score verdict
Which should you buy?
On the Dubspot Score, Full Bucket FB3 comes out ahead (8.2). That said, the right pick depends on your workflow and budget — read both reviews before deciding.
Technical matrix
Specs compared
| Signal | Full Bucket FB3 | Full Bucket Matriq-Six |
|---|---|---|
| Price | Free | Free |
| Dubspot Score | 8.2 | 7.2 |
| Formats | VST, VST3, AU, CLAP, AAX | VST, VST3, AU, CLAP, AAX |
| Type | Hybrid digital/analog synth (Kawai K3 emulation) | Oberheim Matrix-6R emulation (1985 analog polysynth) |
| Oscillators | Two per voice, 32 digital waveforms plus one drawable additive user wave | — |
| Filter | Resonant low-pass / high-pass, analog-style | — |
| Envelopes | Two ADSR (one invertible) | — |
| Modulation | Shapeable LFO with delay routing; velocity and aftertouch | — |
| Polyphony | Up to 64 voices | — |
| Patches | Original factory sounds; Kawai K3 SysEx import/export | Imports Matrix-6R SysEx files |
| Tuning | ODDSound MTS-ESP micro-tuning | — |
| Formats | VST2, VST3, AU (Mac), CLAP, AAX; macOS Universal Binary 2 and Windows | VST2, VST3, CLAP, AAX (Windows); plus AU (macOS); 32- and 64-bit |
| Price | Free | Free |
| Released | September 5, 2026 | October 26, 2026 |
| Modeling | — | 6809 CPU and hardware simulation, ROM v2.15 by Bob Grieb |
| Voices | — | 6 |
| Interface | — | Resizable, native C++ |
| Status | — | Prototype, version 0.5.5 |
See the full plugin database for more comparisons.