“Compagnonnage Recherche-Création sur le temps long autour des concepts et technologies de l’ACROE”, by Claude Cadoz (ACROE Grenoble), Ludger Bruemmer (ZKM Karlsruhe), Hans-Peter Stubbe Teglbjærg (Conservatoire de Copenhague), Giuseppe Gavazza (Conservatoire de Cuneo), Nicolas Castagné (Grenoble-INP, UGA), Francisco Huguet (Université de Salvador) This paper was published, with support of EASTN-DC – EACEA, at the Rencontres Nationales de la Création Musicale, organized by the French Ministry of Culture. It presents long-term works that were conducted by 6 Artists – Researchers, with the tools and concepts developed by ACROE. These works have been structured around the Hélicanthe platform, which brings together all the ACROE creation tools in a coherent set. Two new concepts are proposed and experienced: (1) the concept of Research-Creation works, in which an artistic creation process is considered as a research; (2) the idea that these artworks are musico-techno-scientific objects.