Western swing

Western swing (uncountable)

1. A 1930s to 1940s style of U.S. Southwestern country music with a jazz influence, meshing string bands with other instrumentation - especially drums, trumpet, piano, electric guitar and the steel guitar.

1989, Gunther Schuller, The Swing Era, O.U.P., p. 564: "The most pervasive Southwestern music of all, especially on the radio: the early Western Swing bands, essentially string bands [...] who as early as the beginning 1930s featured guitarists playing improvised single-note lines. These players also pioneered the electric or amplified guitar."