Full Bucket Matriq-Six is a free plugin emulation of the Oberheim Matrix-6R, the 1985 rackmount analog polysynth. Rather than approximating the sound, it models the original 6809 processor and runs ROM v2.15 by Bob Grieb, so it reproduces the real instrument's behavior and loads genuine Matrix-6R SysEx patches.
What you are actually getting
The Matrix-6R was Oberheim's affordable route into the Matrix modulation sound: six voices, two DCOs each, a Curtis analog filter and a flexible software modulation system, all buried behind a menu-driven panel. Matriq-Six recreates that voice at the CPU level and wraps it in a modern, resizable editor, which makes the hardware's famously awkward programming far easier.
The honest limitation
This is an early prototype, version 0.5.5. The developer states plainly that the filters still need work and that some import features may not function yet. It is a purist's work in progress, not a polished studio instrument. For a finished, supported Oberheim-style plugin, a maintained commercial emulation remains the safer pick.
Verdict
Matriq-Six gives Oberheim fans an authentic, free Matrix-6R with real SysEx compatibility and a modern interface over the hardware's menus. Read the full Matriq-Six first look for the specifications and how it compares to paid Oberheim emulations.