NEW YORK, USA (AFP) — An album featuring previously unreleased recordings by rock great Jimi Hendrix will go on sale next month, almost four decades after his death.

Valleys of Neptune will go on sale March 9 featuring “12 fully realised studio recordings, more than 60 minutes of music” that has never been commercially released, the company Experience Hendrix said in a statement.

The album “provides an essential, compelling, and up-till-now largely unseen view of what Jimi Hendrix was up to musically in the critical period between the release of Electric Ladyland in October 1968 and the 1970 opening of his own Electric Lady Studios”.

Janie Hendrix, the sister of the musician and CEO of Experience Hendrix, said “his brilliance shines through on every one of these precious tracks”.

The album is produced by Janie Hendrix, John McDermott and Eddie Kramer. It launches a series of projects marking 40 years since Hendrix died, aged 27, on September 18, 1970.