B.A.C.H. is a new four-voice Eurorack module from Kaona that generates music using twelve different compositional languages including fugue, canon, probability and cellular automata.
According to the Kaona announcement, the module features eight controls shaping musical material, memory, development, transformations, density, tension, voice relationships and performance. Each control has an attenuated CV input. The four tracks provide Gate, Pitch and velocity signals plus MIDI notes on configurable channels. An optional 64-position harmonic progression can follow a chord sequence and a Break function introduces temporary silences.
The module measures 20HP wide (estimated from manufacturer imagery) and is available for preorder with an announced availability date of 15 October 2026.

Source: Kaona, 29 September 2026