Hans Tammen creates music that has been described as an alien world of bizarre textures and a journey through the land of unending sonic operations. He produces rapid-fire juxtapositions of radically contrastive and fascinating sounds, with micropolyphonic timbres and textures, aggressive sonic eruptions, but also quiet pulses and barely audible noises - through means of his ENDANGERED GUITAR and interactive software programming, by working with the room itself, and, as a critic observed, with his "...fingers stuck in a high voltage outlet". Signal To Noise called his works "...a killer tour de force of post-everything guitar damage", All Music Guide recommended him: "...clearly one of the best experimental guitarists to come forward during the 1990s."

His numerous projects include site-specific performances and collaborative efforts with dance, light, video, and theatre, utilizing technology from planetarium projectors to guitar robots and disklavier pianos. He received a Fellowship from the New York Foundation of the Arts (NYFA) in the category Digital/Electronic Arts in 2009 for the ENDANGERED GUITAR - a hybrid guitar/software instrument used to control interactive live sound processing. His THIRD EYE ORCHESTRA open form compositions for large ensembles and live sound processing are inspired by Earle Brown's Available Forms, and based on numerous scored "building blocks" that are constantly rearranged when performed.