Soul music is a combination of rhythm and blues and gospel. Rhythm and blues is itself a combination of blues and jazz, and arose in the 1940s as small groups, often playing saxophones, built upon the blues tradition. Soul music is differentiated by its use of gospel-music devices, its greater emphasis on vocalists, and its merging of religious and secular themes.
Blues A vocal and instrumental form of music based on a pentatonic scale and a characteristic twelve-bar chord progression, blues evolved from African American spirituals, shouts, work songs and chants that found its earliest stylistic roots in West Africa. Blues has been a major influence on later American and Western popular music, finding expression in ragtime, jazz, big band, rhythm & blues, rock & roll, country music, conventional pop songs and even modern classical music.