Maeror Tri was a German experimental ambient and drone music group, active from 1988 to 1996. Consisting of Stefan Knappe, Martin Gitschel, and Helge Siehl, the trio was known for their innovative manipulation of layers of sound to craft hypnotic, often emotionally charged landscapes. Employing an array of electronic equipment and processed instruments, Maeror Tri's soundscapes were rooted in the tradition of industrial and ambient music but also carved a distinct niche for themselves within the experimental music scene.

Throughout their career, Maeror Tri released numerous albums and EPs that pushed the boundaries of ambient music. "The Beauty of Sadness" reflects their ability to intertwine melancholy and beauty in sound, while "Multiple Personality Disorder" suggests a more complex, shifting soundscape experience indicative of the name. "Hafenstadt" and "Mort Aux Vaches: Hypnos/Transe" continued to delve into the depths of the subconscious with drones that captivate and transport the listener. "Myein," another seminal work, showcased the trio's capacity to create immersive aural environments. "Mind Reversal," "Venenum," and "Peak Experience" served to solidify Maeror Tri's reputation as avant-garde maestros whose works left a deep, resonant impact on the post-industrial ambient music scene. After disbanding in 1996, members went on to form Troum, continuing some of the sonic themes and textures that distinguished Maeror Tri's evocative sound.