Dee ihe na-aga n'ihu na paragraf a - A pụrụ ịgbaso mmalite nke ihe nkiri ahụ na usoro nnyefe ekwentị nke Clément Ader gosipụtara na 1881 International Exposition of Electricity
na Paris. Onye isi ala France bụ Jules Grévy mepere usoro a, ma kwe ka mgbasa ozi nke egwu ma ọ bụ ihe nkiri. Ader mere ndokwa ka e nwee ihe ndị na-ebute telivishọn iri asatọ n'ihu otu ebe a na-eme ihe nkiri iji mepụta ụdị ụda stereo binaural. Ọ bụ usoro ọdịyo ụzọ abụọ mbụ, ma mejupụtara usoro nke ndị na-ebugharị ekwentị jikọtara site na ọkwa nke Paris Opera na otu ụlọ na Paris Electrical Exhibition, ebe ndị ọbịa nwere ike ịnụ Comédie-Française na arụmọrụ opera na stereo site na iji ekweisi abụọ; Opera dị ihe karịrị kilomita abụọ site na ebe a na-eme ihe. N'akwụkwọ edemede e dere na November 11, 1881, Victor Hugo kọwara ahụmahụ mbụ ya na theatrophone dị ka ihe na-atọ ụtọ.