Why were commercial recordings of Mississippi Delta blues not made until the late 1920s?

While Mississippi Delta blues existed as a regional folk tradition since at least the turn of the 20th century, commercial recordings did not emerge until the late 1920s because the recording industry had not yet identified or targeted this specific market.1

Early recording efforts in the 1920s primarily focused on "classic" blues, which featured female vocalists accompanied by small combos, such as Bessie Smith and Ma Rainey. It was not until the success of these "race records"—a commercial category of music marketed exclusively to African American audiences—that record labels began to recognize the demand for a wider variety of Black musical styles.12

Once labels like Paramount and Vocalion began exploring the Delta region, they discovered the solo, guitar-driven style of performers such as Charley Patton, whose 1929 recording of "Pony Blues" helped establish the Delta sound in the commercial market. Prior to this, the music remained largely confined to informal, local venues like juke joints and plantations, away from the commercial recording studios of the era.12