back as the bebop era of the 1940s, and it appears with some regularity in blues and rhythm-and-blues of the 1950s and 1960s. Pop and rock Hendrix chord While this sonority has been previously used in jazz and related styles, one particular voicing of this chord is commonly called the "Hendrix Chord" by rock guitarists. This is because it was a favorite of Jimi Hendrix, who did a great deal to popularize its use in mainstream rock music. The most notable Hendrix song that features the 79 chord is "Purple Haze", while it is also implied in "Foxy Lady", both on his 1967 album Are You Experienced?. When performing "Voodoo Child (Slight Return)" live, Hendrix later used not only E79, the sharpened ninth chord on the tonic, but also D79 and C79 chords, the subtonic and submediant. This harmonic device is one of many factors that, according to Gleebeek and Spairo, contribute to "the dirty, raw, metallic, angular sounds of [...] Hendrix songs". It is an example of how he embellished chords "to add new colours to the music, often derived from his own roots in black music". "In essence," John Perry writes, the Hendrix chord is "the whole of the blues scale condensed into a single chord." Other musicians The chord is heard quietly at the end of the bridge in Santo and Johnny's 1959 instrumental hit "Sleep Walk". It was also used more prominently by the Beatles in songs such as "The Word" and "Taxman". McCartney called this a "great ham-fisted jazz chord" that was taught to them by Jim Gretty, who worked at Hessey's music shop in Whitechapel, central Liverpool. George Harrison uses it as the penultimate chord of his solo on "Till There Was You". The chord (a D79) can also be heard in Pink Floyd's "Breathe", and more prominently in "Shine On You Crazy Diamond", both before and after the final guitar solo, before the vocals come in. The chord is favored by Pixies lead guitarist Joey Santiago, with D79, reminiscent of the opening to "A Hard Day's Night", opening and being called the "secret ingredient" of the song "Here Comes Your Man". A "brutally scraped" F79 features in the chorus of "Tame" against the three chord rhythm guitar part's D, C, and F chords. Use as a primary or tonic chord in funk and disco of the 1970s includes Heatwave's "Boogie Nights". Stevie Ray