American roots music in the context of "Music history of the United States"

Bluegrass music is a genre of American roots music that developed in the 1940s in the Appalachian region of the United States. The genre derives its name from the band Bill Monroe and the Blue Grass Boys. Bluegrass has roots in African American genres like blues and jazz and North European genres, such as Irish ballads and dance tunes. Unlike country, it is traditionally played exclusively on acoustic instruments such as the fiddle, mandolin, banjo, guitar and upright bass. It was further developed by musicians who played with Monroe, including 5-string banjo player Earl Scruggs and guitarist Lester Flatt. Bill Monroe once described bluegrass music as, "It's a part of Methodist, Holiness and Baptist traditions. It's blues and jazz, and it has a high lonesome sound."

Bluegrass features acoustic stringed instruments and emphasizes the off-beat. The off-beat can be "driven" (played close to the previous bass note) or "swung" (played farther from the previous bass note). Notes are anticipated, in contrast to laid-back blues where notes are behind the beat; this creates the higher energy characteristic of bluegrass. In bluegrass, as in most forms of jazz, one or more instrumentalists take a turn playing the melody and improvising around it, while the others perform accompaniment; this is especially typified in tunes called breakdowns. This is in contrast to old-time music, where all instrumentalists play the melody together, or one instrument carries the lead throughout while the others provide accompaniment. Breakdowns are often characterized by rapid tempos and unusual instrumental dexterity, and sometimes by complex chord changes.

Western swing, also known as country jazz, is a subgenre of traditional country music.

The movement was an outgrowth of country music and jazz. The music is an amalgamation of rural, cowboy, polka, early Honky Tonk, old-time, Dixieland jazz, and blues blended with swing; and played by a hot string band of fiddles, mandolin, upright bass, electric and acoustic guitars, banjos, and often augmented with drums, saxophones, trumpets, trombones, pianos, accordion and most notably, the steel guitar. The electrically amplified stringed instruments, especially the steel guitar, give the music a distinctive sound.

David Howell Evans (born 8 August 1961), known by his stage name the Edge or simply Edge, is an Irish and British musician, singer, and songwriter. He is best known as the lead guitarist, keyboardist, and backing vocalist of the rock band U2. A member of the group since its inception, he has recorded 15 studio albums with them as well as one solo record. His understated style of guitar playing, a signature of U2's music, is distinguished by chiming timbres, use of rhythmic delay, drone notes, harmonics, and an extensive use of effects units.

Born in England to Welsh parents and raised in Ireland, the Edge formed the band that would become U2 with his classmates at Mount Temple Comprehensive School and his elder brother Dik in 1976. Inspired by the ethos of punk rock and its basic arrangements, the group began to write its own material. They eventually became one of the most successful acts in popular music, with albums such as 1987's The Joshua Tree and 1991's Achtung Baby. Over the years, the Edge has experimented with various guitar effects and introduced influences from several genres of music into his own style, including American roots music, industrial music, and alternative rock. With U2, the Edge has also played keyboards, produced their records Zooropa (1993) and Songs of Surrender (2023), and occasionally served as co-lyricist. The Edge met his second wife, Morleigh Steinberg, through her collaborations with the band.

The Joshua Tree is the fifth studio album by the Irish rock band U2. It was produced by Daniel Lanois and Brian Eno, and was released on 9 March 1987 by Island Records. In contrast to the ambient experimentation of their 1984 album The Unforgettable Fire, for The Joshua Tree the band aimed for a harder-hitting sound within the limitation of conventional song structures. The album is influenced by American and Irish roots music, and through sociopolitically conscious lyrics embellished with spiritual imagery, it contrasts the group's antipathy for the "real America" with their fascination with the "mythical America". The record's theme was inspired by their experiences in the United States, as well as American literature and politics.

Recording began in January 1986 in Ireland, and to foster a relaxed, creative atmosphere, the group primarily recorded in two houses. Several events during the sessions helped shape the conscious tone of the album, including the band's participation in the Conspiracy of Hope benefit concerts for Amnesty International, the death of their roadie Greg Carroll, and lead vocalist Bono's travels to Central America. Recording was completed in November 1986; additional production continued into January 1987. Throughout the sessions, U2 sought a "cinematic" quality for the record, one that would evoke a sense of location, in particular, the open spaces of the U.S. They represented this in the sleeve photography depicting them in American desert landscapes.