Um/Welt is a developing musical research project conceived by double bassist and composer Marco Centasso. The German word Umwelt corresponds to “environment”, literally meaning “surrounding world”. The particular salience of this concept caused biologist Jacob Uexküll to adopt it to denote the particular perspective of any organism as it relates to the world. In this way, each person’s Um/welt is not merely his or her environment, but his or her subjective universe, his or her horizon of interaction with the world, continuously determining and transforming the subject’s way of being, experiencing, and communicating in relation to the surrounding world. The Um/Welt project investigates the creation of worlds in interaction with each other through sound. By creating a space for dialogue between band members, the project asks questions on the interaction between different worlds, in a quest to create new ones that can give possibilities to communicate through sound beyond the barriers of human communication.