Hexinverter Mutant Brain

The Mutant Brain is the central nervous system connecting your modular analog eurorack system to MIDI gear, especially for percussion, polyphonic notes, and sync duties! It packs 16 eurorack compatible outputs into a tiny, super affordable 8HP package.

The 4 CV outputs and 12 Gate/Trig outputs are all universally reconfigurable. Triggers, gates, clock divisions and sync signals, polyphonic keyboard playing, velocity, sequencer transport, LFOs - you name it! 

Configuring your patch is easy - just assign each output as you like in the Mutant Brain Surgery configuration utility, then send the MIDI SysEx file to the module and forget about it - the Mutant Brain remembers it all for you. 

Designed with live and studio performance in mind, the Mutant Brain does away with wasted panel space and complex menu-diving interfaces, while freeing you from the limited "auto-learn" type MIDI interface. An auto-learn interface sometimes doesn't play well with the limitless combinations of different gear setups which today's modular performers play live with.

In September 2022 Stacy Gaudreau - the founder of Hexinverter Électronique, announced closing down the operations. Following their announcement, Erica Synths in cooperation with Hexinverter Électronique saw a way for their incredible and truly unique music instruments to keep on inspiring musicians and finding a home in countless studios to come. We strongly believe the effort and innovation incorporated in Hexinverter Électronique eurorack modules are far too great to prematurely become history. Erica Synths will take over the manufacturing, sales, and support of several Hexinverter Électronique modules. While retaining all functionality of Hexinverter Électronique modules, Erica Synths redesigned the hardware of modules and will provide support for reissue modules only.

The web SysEx patch builder can be found here
!! The firmware updates found on the Hexinverter web are not compatible with our version of the Mutant Brain - our module has no updates that can be installed !!