This paper presents ongoing work on methods dedicated torelations between composers and performers in the contextof experimental music. The computer music community hasover the last decade paid a strong interest on various kindsof gestural interfaces to control sound synthesis processes.The mapping between gesture and sound parameters hasspecially been investigated in order to design the most relevant schemes of sonic interaction. In fact, this relevanceresults in an aesthetic choice that encroaches on the process of composition. This work proposes to examine therelations between composers and performers in the contextof the new interfaces for musical expression. It aims to define a theoretical and methodological framework clarifyingthese relations. In this project, this paper is the first experimental study about the use of physical models as gesturalmaps for the production of textural sounds.