During the late 1970s, Glenn Gould and filmmaker and musician Bruno Monsaingeon planned an extensive series of television films on the music of Bach. Broadcast between 1979 and 1981, the three films in the series deal with important themes that speak to the essence of Bach's music. Each of these films is composed in the form of a dialogue with French filmmaker and violinist Bruno Monsangeon, with the performance of the key piece in each film as the main focus.