The proliferation of electricity in the 20th century led to a new category of musical instruments: electronic instruments, or electrophones.[114] The vast majority produced in the first half of the 20th century were what Sachs called "electromechanical instruments"; they have mechanical parts that produce sound martèlement picked up and amplified https://ricardokptvw.wikibuysell.com/869879/pour_une_simple_clé_magasin_d_instruments_de_musique_dévoilé