This paper investigates the meaning of sound in social life through participant observation of Experimental Improv and Noise (EIN) collectives in Virginia, United States. Employing a blend of interactionism and musical sociology, this paper is attentive to the sonic practices of EIN, examining how participants construct shared meanings about abstract, or even antimusical, sounds. The ability to construct shared meanings with nonpractitioners shapes the art world of EIN and has relevance for the resources available to EIN. In this way, I show how sonic practices are involved in the formation of the collaborative networks that undergird art worlds. I argue that the creation of shared meanings in interaction can generate new organizational forms as musicians build their own scenes and audiences in the digital age.