While Donald Glover was writing, directing and starring in the critically adored Atlanta - his Emmy-and Golden Globe-winning television show - he also had a nice sideline going as Childish Gambino, the rapper behind the triple-platinum hit single Redbone (2016).

But the comedy-drama about Earn Marks (Glover) - a young man trying to make a living managing the nascent rap career of his cousin Alfred (Brian Tyree Henry) - also unites Glover's twin passions of music and film-making, with a bleeding-edge hip-hop soundtrack showcasing the subgenre known as trap, which originated in Atlanta, Georgia.