Hendrix's website said the tracks suggest "new, experimental directions", as he worked on material separate from the Jimi Hendrix Experience.

BBC: New Jimi Hendrix album to be released

He skyrocketed to fame after releasing a wealth of demo recordings and mastered albums with groups such as the Jimi Hendrix Experience, Gypsy Sun and Rainbow and Band of Gypsys.

NPR: Jimi Hendrix On World Cafe

"Jimi told me the music he had been recording at the time was elementary and he wanted a more intricate sound, " said Mr. Cox, who served in the Army with Hendrix and was a member of both the Jimi Hendrix Experience and Band of Gypsys.

WSJ: Experiencing a New Hendrix Relic

Originally a museum dedicated to Seattle native Jimi Hendrix, the Experience Music Project now has all kinds of rock memorabilia and loads of interactive exhibitions.

CNN: Seattle: What to see