"Hello! Ma Baby" is a Tin Pan Alley song written in 1899 by the songwriting team of Joseph E. Howard and Ida Emerson, known as "Howard and Emerson". Its subject is a man who has a girlfriend he knows only through the telephone. At the time, telephones were relatively novel, present in fewer than 10% of U.S. households, and this was the first well-known song to refer to the device. Additionally, the word "Hello" itself was primarily associated with telephone use after Edison's utterance—by 1889, "Hello Girl" was slang for a telephone operator—though it later became a general greeting for all situations.

Tin Pan Alley was a collection of music publishers and songwriters in New York City that dominated the popular music of the United States in the late 19th and early 20th centuries. Originally, it referred to a specific location on West 28th Street, between Fifth and Sixth Avenues in the Flower District of Manhattan, as commemorated by a plaque on 28th Street between Broadway and Sixth. Several buildings on Tin Pan Alley are protected as New York City designated landmarks, and the section of 28th Street from Fifth to Sixth Avenue is also officially co-named Tin Pan Alley.