Bitches Brew is a studio double album by jazz musician Miles Davis, released in April 1970 on Columbia Records. The album continued his experimentation with electric instruments previously featured on his critically acclaimed In a Silent Way album. With the use of these instruments, such as the electric piano and guitar, Davis rejected traditional jazz rhythms in favor of a looser, rock-influenced improvisational style.

Bitches Brew was Davis's first gold record, selling more than half a million copies. Upon release, it received a mixed response, due to the album's unconventional style and revolutionary sound. Later, Bitches Brew gained recognition as one of jazz's greatest albums and a progenitor of the jazz rock genre, as well as a major influence on rock and funk musicians. The album won a Grammy Award for Best Large Jazz Ensemble Album in 1971. In 1998, Columbia Records released The Complete Bitches Brew Sessions, a four-disc box set that included the original album as well as the studio sessions through February 1970.

Miles Dewey Davis III (May 26, 1926 – September 28, 1991) was an American jazz musician, trumpeter, bandleader, and composer. Widely considered one of the most influential musicians of the 20th century, Miles Davis was, with his musical groups, at the forefront of several major developments in jazz music, including bebop, cool jazz, hard bop, modal jazz, and jazz fusion.

Miles Dewey Davis was born on May 26, 1926, to an affluent African American family in Alton, Illinois. His father, Dr. Miles Henry Davis, was a dentist. In 1927 the family moved to East St. Louis, Illinois. They also owned a substantial ranch in northern Arkansas, where Davis learned to ride horses as a boy.

Davis' mother, Cleota Mae (Henry) Davis, wanted her son to learn the piano; she was a capable blues pianist but kept this fact hidden from her son. His musical studies began at 13, when his father gave him a trumpet and arranged lessons with local musician Elwood Buchanan. Davis later suggested that his father's instrument choice was made largely to irk his wife, who disliked the trumpet's sound. Against the fashion of the time, Buchanan stressed the importance of playing without vibrato; he was reported to have slapped Davis' knuckles every time he started using heavy vibrato. Davis would carry his clear signature tone throughout his career. He once remarked on its importance to him, saying, "I prefer a round sound with no attitude in it, like a round voice with not too much tremolo and not too much bass. Just right in the middle. If I can’t get that sound I can’t play anything."Clark Terry was another important early influence.^{[citation needed]}

James Marshall "Jimi" Hendrix (born Johnny Allen Hendrix; November 27, 1942 – September 18, 1970) was an American musician and singer-songwriter. He is widely considered to be the greatest electric guitarist in music history, and one of the most influential musicians of his era despite mainstream exposure limited to just three years. After initial success in Europe with his group The Jimi Hendrix Experience, he achieved fame in the United States following his 1967 performance at the Monterey Pop Festival. Later, he headlined the iconic 1969 Woodstock Festival and the 1970 Isle of Wight Festival. He often favored raw overdriven amplifiers with high gain and treble and helped develop the previously undesirable technique of guitar amplifier feedback.

Hendrix helped to popularize use of the wah-wah pedal in mainstream rock, which he often used to deliver tonal exaggerations in his solos, particularly with high bends, complex guitar playing, and use of legato. As a record producer, he also broke new ground in using the recording studio as an extension of his musical ideas. He was one of the first to experiment with stereophonic phasing effects for rock recording.^{[citation needed]} He was influenced by blues artists such as B.B. King, Muddy Waters, Howlin' Wolf, Albert King and Elmore James,rhythm and blues and soul guitarists Curtis Mayfield and Steve Cropper, and the jazz guitarist Wes Montgomery. Hendrix began dressing and wearing a moustache like Little Richard when he performed and recorded in his band from March 1, 1964 through to the spring of 1965. In 1966, he stated, "I want to do with my guitar what Little Richard does with his voice".

Dave Holland (born October 1, 1946) is an English jazz double bassist, composer and bandleader who has been performing and recording for five decades. He has lived in the United States for 40 years.

His work ranges from pieces for solo performance to big band. Holland runs his own independent record label, Dare2, which he launched in 2005. He has explained his musical philosophy by quoting fellow jazz artist Sam Rivers. "Sam said, ‘Don’t leave anything out — play all of it,’ ”

Holland has played with some of the greatest names in jazz, and has participated in several classic recording sessions.

Born in Wolverhampton, England, Holland taught himself how to play stringed instruments, beginning at four on the ukulele, then graduating to guitar and later bass guitar. He quit school at the age of 15 to pursue his profession in a top 40 band, but soon gravitated to jazz. After seeing an issue of Down Beat where Ray Brown had won the critics' poll for best bass player, Holland went to a record store, and bought a couple of LPs featuring Brown backing pianist Oscar Peterson. He also bought two Leroy Vinnegar albums (Leroy Walks! and Leroy Walks Again) because the bassist was posed with his instrument on the cover. Within a week, Holland traded in his bass guitar for an acoustic bass and began practicing with the records. In addition to Brown and Vinnegar, Holland was drawn to the bassists Charles Mingus and Jimmy Garrison.

Eddie Jefferson (August 3, 1918 – May 9, 1979) was a celebrated jazz vocalist and lyricist. He is credited as an innovator of vocalese. (Jefferson himself claims that his main influence was Leo Watson 27/2/1898-02.5/1950. see Wikipedia entry), a musical style in which lyrics are set to an instrumental composition or solo. Perhaps his best-known song is "Moody's Mood for Love", though it was first recorded by King Pleasure, who cited Jefferson as an influence. Jefferson's songs "Parker's Mood" and "Filthy McNasty" were also hits.

Jefferson was born in Pittsburgh, Pennsylvania. One of his most notable recordings, “So What”, combined the lyrics of artist Christopher Acemandese Hall with the music of Miles Davis to highlight his skills, and enabled him to turn a phrase, into his style he calls jazz vocalese.

Jefferson's last recorded performance was at the Joe Segal's Jazz Showcase in Chicago and was released on video by Rhapsody Films. He shared the stand with Richie Cole (alto sax), John Campbell (piano), Kelly Sill (bass) and Joel Spencer (drums). The performance was part of a tour that Jefferson and Cole led together. Their opening night in Detroit, Michigan was at Baker's Keyboard Lounge, a jazz club built in the 1930s that has played host to famous musicians including musicians who spanned the genre with artists as diverse as Dexter Gordon and Sonny Stitt.