A new BBC documentary claims that Prince has recorded at least 2,000 songs that have never been heard by the general public.
The documentary is presented by BBC journalist and lifelong Prince fan Mobeen Azhar.
Azhar wanted to investigate the legend that Prince has enough unreleased music to put out an album a year for the next century.
Rogers tells Azhar that some of these songs will never be heard. She mentions one "beautiful" song:
The background vocal arrangements, the expression of it was just gorgeous. Of course he played all the instruments. We finished recording the song and then Prince said to me, "Erase it."' He said it very calmly. I could feel the fan in me screaming "No!"
I said, "Think about it. Wait til tomorrow at least." He reached over and hit Record. He erased it. It was gone.
Another of Prince's collaborators, composer Brent Fischer, told Azhar that "over 70% of the music we've worked on...has yet to be released".
Azhar told BuzzFeed News:
The thing that really strikes me is the number (at least 2,000 tracks) but also that many Prince associates told us that Prince thinks about the future a lot. He believes "future generations" will listen to his new releases. So the question as I see it, is not "When will the vault open?" but more "Will we be alive long enough to hear it?"
Those in the UK can listen to Hunting for Prince's Vault on BBC Radio 4 at 10.30am on Saturday 21 March – or on the iPlayer. There's also a longer version on BBC World Service from 8.05pm, which will be available on the World Service website.