Prior to the development of the gramophone, Canadian songwriters' works were published as sheet music, or in periodicals in local newspapers such as The Montreal Gazette and Toronto Empire. Most recordings purchased by Canadians in the early days of the gramophone were made by American and British performers, behind some of these international hits were Canadian songwriters. Robert Nathaniel Dett (1882–1943) was among the first Black Canadian composers during the early years of the American Society of Composers, Authors and Publishers. His works often appeared among the programs of William Marion Cook's New York syncopated Orchestra. Dett himself performed at Carnegie Hall and at the Boston Symphony Hall as a pianist and choir director. Following quickly on the gramophone's spread came Canada's involvement in the First World War. The war was the catalyst for the writing and recording of large numbers of Canadian-written popular songs, some of which achieved lasting international commercial success. The military during World War I produced official music such as regimental marches and songs as well as utilitarian bugle calls. The soldiers had a repertoire of their own, largely consisting of new, often ribald, lyrics to older tunes.
By the end of World War II, "mountaineer" string band music known as bluegrass had emerged when Bill Monroe joined with Lester Flatt and Earl Scruggs, introduced by Roy Acuff at the Grand Ole Opry. That was the ordination of bluegrass music and how Bill Monroe became to be known as the "Father of Country Music." Gospel music, too, remained a popular component of bluegrass and other sorts of country music. Red Foley, the biggest country star following World War II, had one of the first million-selling gospel hits ("Peace in the Valley") and also sang boogie, blues and rockabilly. In the post-war period, country music was called "folk" in the trades, and "hillbilly" within the industry. In 1944, The Billboard replaced the term "hillbilly" with "folk songs and blues," and switched to "country" or "country and Western" in 1949. https://www.youtube.com/watch?v=hyNAvdnZ5Ec