In Sotto Voce were supposedly two Yugoslavians named Ilya Dimitrijevic (Voice and guitar) and Boris Mikulic (Keyboards and electronics) who met each other at the University of Ljubljana where Ilya studied social sciences and Boris computer sciences. They started out by making music for theatre productions. After two years of doing this, they founded In Sotto Voce. They gave up studying and Ilya became a DJ in the "Draga Grad" new wave club where he came in contact with a lot of Belgian electronic stuff. They were influenced by Belgian acts as Front 242, Men 2nd, The Neon Judgement and Poésie Noire.

But in actual fact, Ilya Dimitrijevic & Boris Mikulic were Jo Casters & Herman Gillis of Poésie Noire, who started this secret side-project in response to a Belgian journalist who found Poésie Noire too "poppy".