Editing Rhythm and blues (section)

===Precursors===
[[File:Louis Jordan, New York, N.Y., ca. July 1946 (William P. Gottlieb 04721).jpg|thumb|upright|[[Louis Jordan]] in New York City, {{circa}} July 1946]]

The [[Great migration (African American)|great migration]] of Black Americans to the urban industrial centers of Chicago, Detroit, New York City, Los Angeles, Washington, D.C. and elsewhere in the 1920s and 1930s created a new market for jazz, blues, and related genres of music. The migration of African Americans to urban centers in the 1920s and 1930s helped shape rhythm and blues by blending jazz, blues, and urban influences.<ref>{{Cite journal |last=Lorre |first=Sean |date=2019-09-03 |title=Rhythm and Bluebeat“Jamaican R&B,” Live and on Record, in Early-1960s’ London |url=https://online.ucpress.edu/jpms/article-abstract/31/3/95/105965/Rhythm-and-Bluebeat-Jamaican-R-amp-B-Live-and-on?redirectedFrom=fulltext |journal=Journal of Popular Music Studies |language=en |volume=31 |issue=3 |pages=95–118 |doi=10.1525/jpms.2019.313010|url-access=subscription }}</ref>These genres of music were often performed by full-time musicians, either working alone or in small groups. The precursors of rhythm and blues came from jazz and blues, which overlapped in the late-1920s and 30s through the work of musicians such as the [[Harlem Hamfats]], with their 1936 hit "Oh Red", as well as [[Lonnie Johnson (musician)|Lonnie Johnson]], [[Leroy Carr]], [[Cab Calloway]], [[Count Basie]], and [[T-Bone Walker]]. There was also increasing emphasis on the [[electric guitar]] as a lead instrument, as well as the [[piano]] and [[saxophone]].<ref name=richards>{{cite web|url=http://findarticles.com/p/articles/mi_g1epc/is_tov/ai_2419101026/?tag=content;col1 |archive-url=https://web.archive.org/web/20091207042839/http://findarticles.com/p/articles/mi_g1epc/is_tov/ai_2419101026/?tag=content;col1 |url-status=dead |archive-date=December 7, 2009 |title=Tad Richards, "Rhythm and Blues", St. James Encyclopedia of Pop Culture |website=Findarticles.com |date=January 29, 2002 |access-date=April 20, 2012}}</ref>