It is considered "roots music" because it served as the basis of music later developed in the United States, including rock and roll, contemporary folk music, rhythm and blues, and jazz. Appalachian music is the traditional music of the region of Appalachia in the Eastern United States. It derives from various European and African influences—including English ballads, Irish and Scottish traditional music (especially fiddle music), hymns, and African-American blues. First recorded in the 1920s, Appalachian musicians were a key influence on the early development of Old-time music, country music, and bluegrass, and were an important part of the American folk music revival. Instruments typically used to perform Appalachian music include the banjo, American fiddle, fretted dulcimer, and guitar. Early recorded Appalachian musicians include Fiddlin' John Carson, Henry Whitter, Bascom Lamar Lunsford, the Carter Family, Clarence Ashley, Frank Proffitt, and Dock Boggs, all of whom were initially recorded in the 1920s and 1930s. Several Appalachian musicians obtained renown during the folk revival of the 1950s and 1960s, including Jean Ritchie, Roscoe Holcomb, Ola Belle Reed, Lily May Ledford, and Doc Watson. The Carter Family was a traditional American folk music group that recorded between 1927 and 1956. Their music had a profound impact on bluegrass, country, Southern Gospel, pop and rock musicians. They were the first vocal group to become country music stars; a beginning of the divergence of country music from traditional folk music. Their recordings of such songs as "Wabash Cannonball" (1932), "Will the Circle Be Unbroken" (1935), "Wildwood Flower" (1928), and "Keep on the Sunny Side" (1928) made them country standards. Country and bluegrass artists such as Loretta Lynn, Roy Acuff, Dolly Parton, Earl Scruggs, Chet Atkins, and Don Reno were heavily influenced by traditional Appalachian music. Artists such as Bob Dylan, Jerry Garcia, and Bruce Springsteen have performed Appalachian songs or rewritten versions of Appalachian songs. Cajun music, an emblematic music of Louisiana, is rooted in the ballads of the French-speaking Acadians of Canada. Cajun music is often mentioned in tandem with the Creole-based, Cajun-influenced zydeco form, both of Acadiana origin. These French Louisiana sounds have influenced American popular music for many decades, especially country music, and have influenced pop culture through mass media, such as television commercials.