shoulder strap. Oswald's Dobro attracted interest and fascination; he said, "People couldn't understand how I played it and what it was, and they'd always want to come around and look at it." Josh Graves (Uncle Josh) further popularized the resonator steel guitar into Bluegrass music with Flatt and Scruggs to the extent that this type of lap steel became an established and familiar fixture in this genre. The dobro fell out of favor in mainstream country music until a bluegrass revival in the 1970s brought it back with younger virtuoso players like Jerry Douglas whose Dobro skills became widely known and emulated. Electrification In 1934, a steel guitarist named George Beauchamp invented the electric guitar pickup. He found that a vibrating metal string in a magnetic field generates a small current that can be amplified and sent to a loudspeaker; his steel guitar was the world's first electric guitar. According to music writer Michael Ross, the first electrified stringed instrument on a commercial recording was a steel guitar played by Bob Dunn on a Western swing tune in 1935. Dunn recorded with Milton Brown and his Musical Brownies. Western swing In the early 1930s, the newly-electrified lap steel guitar was adopted by musicians type of dance music known as "Western swing", a sub-genre of country music combined with jazz swing. The design of this instrument and the way it was played underwent continual change as the music of the genre evolved. In the 1930s, Leon McAuliffe advanced steel guitar technique while playing in the western swing band Bob Wills and his Texas Playboys. In october, 1936, McAuliffe recorded "Steel Guitar Rag" with Wills' band on a Rickenbacker B–6 lap steel with phenomenal record sales. Steel guitarists felt a need to change tunings for different voicings, so leading players added additional necks with different tunings on the same instrument. The added bulk meant that the instrument could no longer be managed on the player's lap and required placement in a frame with legs and marketed as a "console" steel guitar. Prominent layers of that era, including Herb Remington and Noel Boggs, added more necks and eventually played instruments with up to four different necks. Honky-tonk By the late 1940s, the steel guitar featured prominently in "honky-tonk" style of country music. Honky-tonk singers who used a lap steel guitar in their musical arrangements included Hank Williams, Lefty Frizzell and Webb Pierce. Most