Jean Hoyoux has been played on NTS in shows including Optimo, featured first on 4 November 2016. Songs played include La Marssivité and Les Saturnales.

Hoyoux was a Belgian psychologist, astrologer, and musician. He co-founded l'Institut National d'AnthropoCosmologie with Jacques Vanaise. Hoyoux released at least two private-press albums in small quantities, Planètes in 1981, and Hymne in 1985. He died in 1986.