Hidden in your rack, this module behaves more like a living, volatile organism than a polite effects unit. It thrives on voltage, tubes, and pressure, pushing your modular system into territories that feel raw, immediate, and beautifully unstable.
STIGMA by ARCAICO is a true stereo and dual mono tube-based Eurorack processor that fuses analog filtering, saturation, distortion, and percussive synthesis into a single 22 HP module. Built around real thermoionic tubes and a self-oscillating filter core, it can glide from gentle analog warmth to brutal clipping, transforming drum machines, oscillators, and full mixes into harmonically dense, physically present textures. Its flexible routing lets you treat two independent sources or sculpt the stereo field with matched tube stages, giving you detailed control over how your sound is driven, filtered, and torn apart.
Push the filter into self-oscillation and STIGMA becomes an instrument in its own right, capable of generating kicks, metallic toms, and industrial-flavored percussive bodies that are saturated directly through its tube stage. With CV-ready controls across its Eurorack interface, it invites complex modulation and dynamic interaction inside the patch, turning simple control voltages into evolving, destructive soundscapes. Despite the aggression on tap, its compact 35 mm depth and carefully managed current draw make it a practical fit in modern cases, ready to act as the analog heart of a distortion-focused system or the secret weapon at the end of your stereo chain.
