From Dolly Parton to Pearl Jam, White Stripes to Snoop Dogg... this facility in Nashville is not just a recording studio but a teaching academy too. Steve Sutherland explains...
Name's Gregg...' We're some 30 minutes into the interview when the door to the cramped London hotel room opens and he stumbles in and collapses onto the bed. He's wearing headphones big as earmuffs and appears to be listening to something or other on his Walkman.