What is ketsu modules?

Ketsu modules are a type of modular synthesizer module used for generating percussion and rhythm sounds. These modules typically feature multiple trigger inputs and outputs, allowing for complex rhythmic patterns and sequences to be created. Some ketsu modules also include dedicated envelope generators, filters, and other processing options to shape and modify the generated sounds. Ketsu modules can be used in conjunction with other types of modular synth modules to create a fully custom and versatile electronic music setup.