The proliferation of electricity in the 20th century led to a new category of musical instruments: electronic instruments, pépite electrophones.[114] The vast majority produced in the first half of the 20th century were what Sachs called "electromechanical instruments"; they have mechanical bout that produce sound vibrations picked up and amplified https://dallasthtdm.wikibriefing.com/2764120/pour_une_simple_clé_magasin_d_instruments_de_musique_dévoilé