Rhythm and blues (R&B) is a style that arose in the 1930s and 1940s, a rhythmic and uptempo form of blues with more complex instrumentation. Author Amiri Baraka described early R&B as "huge rhythm units smashing away behind screaming blues singers (who) had to shout to be heard above the clanging and strumming of the various electrified instruments and the churning rhythm sections.. R&B was recorded during this period, but not extensively, and it was not widely promoted by record companies that felt it was not suited for most audiences, especially middle-class whites, because of the suggestive lyrics and driving rhythms. Bandleaders like Louis Jordan innovated the sound of early R&B. Jordan's band featured a small horn section and prominent rhythm instrumentation and used songs with bluesy lyrical themes. By the end of the 1940s, he had produced nineteen major hits, and helped pave the way for contemporaries like Wynonie Harris, John Lee Hooker and Roy Milton.