fɹʌm nˈaɪntiːnhˈʌndɹɪd fˈɪfti ˈɔn, hiː wʌz ɪŋkɹˈiːsɪŋli ɪnvˈɑːlvd wɪð ᵻlɛktɹˈɑːnɪk mjˈuːzɪk ænd dʒˈɔɪnd pɪˈɛɹ ʃˈiːfɚz ɡɹˈuːp dɚ ɹᵻtʃˈɜːtʃ də mjuːsˈiːk kˈɑːŋkɹiːt.
From 1950 on, he was increasingly involved with electronic music and joined Pierre Schaeffer's Groupe de Recherche de Musique Concrète.