French drummer and composer Seb Brun, working as Ar Ker, develops a unique practice at the intersection of acoustic percussion and electronic sound. This video on the Carton Records channel presents his augmented drum kit — equipped with piezo microphones, transducers, modular synthesizers and custom circuits — where electronics are integrated into the instrumental gesture. The project's second album, Materials (Carton Records, December 2026), structures three movements around maple wood, bronze and copper, each shaping the sonic architecture. Ar Ker's live adaptation expands the experience through audio-reactive lighting. A compelling document of contemporary experimental music that values repetition, accumulation and instability as creative forces.