The producer continues to take a hand in the release of material left behind when Hendrix died in 1970. He was involved in the production of documentary movie Electric Church, which tells the story of the Hendrix's appearance at the Atlanta Pop Festival, just weeks before he passed away.

Kramer tells the BBC: "This was the crossroads for him. The next move would have been incorporating some of the stuff that was on the street. He was aware of everything that was going on - he was a musical sponge."