The real, exact number is virtually hard to reveal. Prince's storied vault featuring thousands of secret songs, albums and even movies, has been the source of much speculation among the late musician’s purple people for decades.
"I know there's a lot of material in the vault that never got released," Prince's longtime friend and sound engineer, David Rivkin, told the Daily News.
Investigative reporter and filmmaker Mobeen Azhar also confirmed that the treasure trove exists last year in his documentary, “Hunting for Prince’s Vault.”
“There is enough unreleased studio material for him to put out an album a year for the next 100 years,” Azhar said.
Sales of Prince’s music have skyrocketed since the artist’s death. According to Nielsen Music, in the three days following his death there were 2.3 million Prince song sales.
Of interest, discover 11 Popular Songs You Never Knew Prince Wrote, featured at People.com.