|Cultural origins||Early to mid-1960s, US and UK|
Blues rock is a fusion music genre that combines elements of blues and rock music. It is mostly an electric ensemble-style music with instrumentation similar to electric blues and rock: electric guitar, electric bass guitar, and drums, sometimes with keyboards and harmonica. From its beginnings in the early to mid-1960s, blues rock has gone through several stylistic shifts and along the way it inspired and influenced hard rock, Southern rock, and early heavy metal.
Blues rock started with rock musicians in the UK and the US performing American blues songs. They typically recreated electric Chicago blues songs, such as those by Muddy Waters, Jimmy Reed, Howlin' Wolf, and Albert King, at faster tempos and with a more aggressive sound common to rock. In the UK, the style was popularized by groups such as the Rolling Stones, the Yardbirds, and the Animals, who put several blues songs into the pop charts. In the US, Lonnie Mack, the Paul Butterfield Blues Band, and Canned Heat were among the earliest exponents. These bands also "attempted to play long, involved improvisations which were commonplace on jazz records". John Mayall & the Bluesbreakers and Peter Green's Fleetwood Mac also developed this more instrumental, but traditional-based style in the UK, while late 1960s and early 1970s groups, including Ten Years After, Savoy Brown, the Climax Blues Band and Foghat, became more hard rock oriented. In the US, Johnny Winter, the Allman Brothers Band, and ZZ Top represented a hard rock trend.
While blues rock and hard rock shared a lot of similarities in the early 1970s, more traditional blues styles influenced blues rock in the 1980s, when the Fabulous Thunderbirds and Stevie Ray Vaughan recorded their best-known works, and the 1990s, which saw guitarists Gary Moore, Jeff Healey, and Kenny Wayne Shepherd become popular concert attractions. Groups such as the Jon Spencer Blues Explosion and the White Stripes brought an edgier, more diverse style into the 2000s, while the Black Keys returned to basics.
Blues rock can be characterized by bluesy improvisation, the twelve-bar blues, extended boogie jams typically focused on the electric guitar player, and often a heavier, riff-oriented sound and feel to the songs than found in typical Chicago-style blues. Blues rock bands "borrow[ed] the idea of an instrumental combo and loud amplification from rock & roll". It is also often played at a fast tempo, again distinguishing it from the blues.
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The core blues rock sound is created by the electric guitar, bass guitar and drums. The electric guitar is usually amplified through a tube guitar amplifier or using an overdrive effect. Two guitars are commonplace in blues rock bands: one guitarist focused on rhythm guitar, playing riffs and chords as accompaniment; and the other focused on lead guitar, playing melodic lines and solos.
While 1950s-era blues bands sometimes used the upright bass, the blues rock bands of the 1960s used the electric bass, which was easier to amplify to loud volumes. Keyboard instruments, such as the piano and Hammond organ, are also occasionally used. As with the electric guitar, the sound of the Hammond organ is typically amplified with a tube amplifier, which gives a growling, "overdriven" sound quality to the instrument.
Vocals also typically play a key role, although the vocals may be equal in importance or even subordinate to the lead guitar playing. As well, a number of blues rock pieces are instrumental-only. Sometimes bands also included a Richter-tuned harmonica or "harp".
Blues rock pieces often follow typical blues structures, such as twelve-bar blues, sixteen-bar blues, etc. They also use the I-IV-V progression, though there are exceptions, some pieces having a "B" section, while others remain on the I. The Allman Brothers Band's version of "Stormy Monday", which uses chord substitutions based on Bobby "Blue" Bland's 1961 rendition, adds a solo section where "the rhythm shifts effortlessly into an uptempo 6/8-time jazz feel". The key is usually major, but can also be minor, such as in "Black Magic Woman".
One notable difference is the frequent use of a straight eighth-note or rock rhythm instead of triplets usually found in blues. An example is Cream's "Crossroads". Although it was adapted from Robert Johnson's "Cross Road Blues", the bass "combines with drums to create and continually emphasize continuity in the regular metric drive". Cream also uses some of the lyrics from "Traveling Riverside Blues" to create their own interpretation of the song.
Rock and blues have historically always been closely linked, with driving rhythms and electric guitar techniques such as distortion and power chords already used by 1950s blues guitarists, particularly Memphis bluesmen such as Joe Hill Louis, Willie Johnson and Pat Hare. Characteristics that blues rock adopted from electric blues include its dense texture, basic blues band instrumentation, rough declamatory vocal style, heavy guitar riffs, string-bending blues-scale guitar solos, strong beat, thick riff-laden texture, and posturing performances. Precursors to blues rock included the Chicago blues musicians Elmore James, Albert King, and Freddie King, who began incorporating rock and roll elements into their blues music during the late 1950s to early 1960s.
1963 marked the appearance of American rock guitar soloist Lonnie Mack, whose idiosyncratic, fast-paced electric blues guitar style came to be identified with the advent of blues rock as a distinct genre. His instrumentals from that period were recognizable as blues or rhythm and blues tunes, but he relied heavily upon fast-picking techniques derived from traditional American country and bluegrass genres. The best-known of these are the 1963 Billboard hit singles "Memphis" and "Wham!". Around the same time, the Paul Butterfield Blues Band was formed. Fronted by blues harp player and singer Paul Butterfield, it included two members from Howlin' Wolf's touring band, bassist Jerome Arnold and drummer Sam Lay, and later two electric guitarists, Mike Bloomfield and Elvin Bishop. In 1965, its debut album, The Paul Butterfield Blues Band was released. AllMusic's Michael Erlewine commented, "Used to hearing blues covered by groups like the Rolling Stones, that first album had an enormous impact on young (and primarily White) rock players." The second album East West (1966) introduced extended soloing – the 13 minute instrumental title track included jazz and Indian raga influences – that served as a model for psychedelic and acid rock. In 1965, avid blues collectors Bob Hite and Alan Wilson formed Canned Heat. Their early recordings focused heavily on electric versions of Delta blues songs, but soon began exploring long musical improvisations ("jams") built around John Lee Hooker songs. Other popular mid-1960s groups, such as the Doors and Big Brother and the Holding Company with Janis Joplin, also adapted songs by blues artists to include elements of rock. Butterfield, Canned Heat, and Joplin performed at the Monterey (1967) and Woodstock (1969) festivals.
In the UK, several musicians honed their skills in a handful of British blues bands, primarily those of Cyril Davies and Alexis Korner. While the early British rhythm and blues groups, such as the Rolling Stones, the Yardbirds, and the Animals, incorporated American R&B, rock and roll, and pop, John Mayall took a more distinctly electric blues approach. In 1966, he released Blues Breakers with Eric Clapton, the first of several influential blues rock albums. When Eric Clapton left Mayall to form Cream, they created a hybrid style with blues, rock, and jazz improvisation, which was the most innovative to date. British band Fleetwood Mac initially played traditionally-oriented electric blues, but soon evolved. Their guitarist Peter Green, who was Clapton's replacement with Mayall, brought many innovations to their music.
The electric guitar playing of Jimi Hendrix (a veteran of many American rhythm and blues and soul groups from the early-mid-1960s) and his power trios, the Jimi Hendrix Experience and Band of Gypsys, had a broad and lasting influence on the development of blues rock, especially for guitarists. Clapton continued to explore several musical styles and contributed to bringing blues rock into the mainstream. In the late 1960s, Jeff Beck, with his band the Jeff Beck Group, developed blues rock into a form of heavy rock. Jimmy Page, who replaced Beck in the Yardbirds, followed suit with Led Zeppelin and became a major force in the 1970s heavy metal scene. Other blues rock musicians in the 1970s include Dr. Feelgood, Rory Gallagher and Robin Trower.
Beginning in the early 1970s, American bands such as Aerosmith fused blues with a hard rock edge. Blues rock grew to include Southern rock bands, like the Allman Brothers Band, ZZ Top and Lynyrd Skynyrd, while the British scene, except for the advent of groups such as Status Quo and Foghat, became focused on heavy metal innovation.
Blues rock had a rebirth in the early 1990s–2000s, with many artists such as Gary Moore, Tedeschi Trucks Band, Kenny Wayne Shepherd, Gary Clark Jr., Susan Tedeschi, the White Stripes, Jack White, Walter Trout, John Mayer, Blues Traveler, the Black Crowes, the Black Keys, Jeff Healey, Gov't Mule, Clutch, the Jon Spencer Blues Explosion Joe Bonamassa, and Guy Forsyth.
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