Jules Ch矇ret (May 31, 1836 - September 23, 1932) was a French painter and lithographer who became a master of Belle ?poque poster art. He has been called the father of the modern poster. Th矇璽trophone, an 1896 lithograph from the Les Maitre de L'Affiches series by Jules Ch矇ret. Th矇璽trophone was a telephonic distribution system available in portions of Europe that allowed the subscribers to listen to opera and theatre performances over the telephone lines. The th矇璽trophone evolved from a Cl矇ment Ader invention, which was first demonstrated in 1881, in Paris. It was the first two-channel audio system, and consisted of a series of telephone transmitters connected from the stage of the Paris Opera to a suite of rooms at the Paris Electrical Exhibition, where the visitors could hear Com矇die-Fran癟aise and opera performances in stereo using two headphones. Subsequently, in 1890, the invention was commercialized by Compagnie du Th矇璽trophone, but finally succumbed to the rising popularity of radio broadcasting and the phonograph, and ceased its operations in 1932.