It was called Acousmatic

Daniel Teruggi (composer, director of GRM 1997-2017) to Patrick . (composer, Floating Sound Gallery) on Acousmatic, its meanings, origins and history: - hearing phenomena, - cinema for the ears, - Pierre Schaeffer, Luc Ferrari and Francois Bayle, - “music concrete“ vs. “music abstract“, - “sound object“ and “musical object“, - active listening. GRM (Paris), June 2018.