Purple Haze track on the American release of "Are You Experienced" on August 23, 1967. Because of the song's airplay on underground FM radio, the album became more popular than Hendrix's singles. One of Hendrix's most popular songs, "Purple Haze" appears on numerous compilation albums. Some of these include "Smash Hits", "The Essential Jimi Hendrix", "The Singles Album", "Kiss the Sky", "", "The Ultimate Experience", "", "", and "The Singles Collection". An alternative version recorded at the same time, but with different vocal and guitar overdubs, is the first song on "The Jimi Hendrix Experience" 2000 box set. Live recordings of "Purple
Angel (Jimi Hendrix song) of material recorded during this period, "Angel" was produced by Hendrix and engineered by Eddie Kramer. Jimi Hendrix wrote "Angel" in reference to a dream he had about his mother, Lucille Hendrix née Jeter, when he was a child; speaking in a December 1967 interview conducted by Meatball Fulton, Hendrix explained the inspiration behind the song by describing the dream as follows: Writing for the biography "Jimi Hendrix: Electric Gypsy", Hendrix historians Harry Shapiro and Caesar Glebbeek have compared "Angel" – which they describe as "arguably Jimi's finest ballad" – with fellow "The Cry of Love" track "Night Bird Flying",