Born in Eastern Belgium during 1935, Leo Kupper studied musicology at the Liège Conservatory, before becoming Henri Pousseur’s assistant at the newly formed Apelac Studio in Brussels in 1958. It was there that he began composing, eventually leading to the founding of his own studio, the Studio de Recherches et de Structurations Electroniques Auditives, in 1967, as well as the construction of numerous specialized instruments of his own design that would help sculpt his signature sound over the years to come. Among these was his GAME machine – Générateur Automatique de Musique Electronique (Automatic Generator of Electronic Music), and his Sound Domes, which transformed the sounds of the audience, via hundreds of loudspeakers, into sonic spaces of contemplation that attempted to bend space and time. Working meticulously at a slow pace, over the course of roughly 30 years, he composed around 35 pieces of electronic music, vocal and instrumental music, as well as midi and computer music.

https://www.soundohm.com/article/leo-kupper