How does the music industry work? Planet Money started a record label to find out

Earlier this year, a musician named Kinny Landrum sent Planet Money an email, and he made an unusual proposal. Back in the 1970s, Kinny explained, he was the keyboardist for an instrumental funk band called Sugar Daddy and the Gumbo Roux. This was the height of the "stagflation" era, when stagnating …