The Opsix Module is the desk module version of the Opsix FM synthesizer with rackmount capability. The Opsix mk II Altered FM synthesizer is based on the original Opsix's sound engine and has expanded its polyphony to 64 voices. The Opsix operator mixer simplifies the processing of FM synthesis in an unprecedented way, making it not only understandable but also easily manageable. It expands synthesis possibilities in a subtractive direction as well as programmability through its modulation matrix. Additionally, it is compatible with the sounds of the original Opsix and Opsix Native software, including numerous sound libraries created by third parties.

At the core of every sound is the Opsix mk II's operator mixer - a handy row of six sliders and knobs to explore the cumulative effects on the sound. The sliders are red in carrier mode and blue as modulators. These straightforward, accessible controls are part of the unique nature of the Opsix mk II as well as the sounds it offers. Last but not least, Opsix's highly flexible and efficient architecture is based on six-operator FM. As a result, it produces easily recognizable sounds from the 80s to the present – with greater polyphony than ever before in an FM synthesizer.