In a warehouse in Minneapolis back in 1983, legendary artist Prince asked his newly hired sound technician to set up to record Let's Go Crazy, a song that would become one of his greatest hits.
In that moment Susan Rogers went from sound tech to sound engineer.
She was the power behind the throne for some of Prince's most successful albums including Purple Rain, and Sign o' the Times.
Then she walked away from Prince to pursue a PHD and is now a professor at the prestigious Berklee college of Music where she explores the psychology of music.
Last year the Prince estate released a remastered version of Sign o' the Times with 63 previously unreleased tracks.
Susan Rogers recorded some of them.