Snape Maltings, Suffolk This year’s Aldeburgh festival opened with a stripped-back concert staging by Rory Kinnear with Ryan Wigglesworth conducting the BBC Scottish Symphony Orchestra Trying to unlock the secrets of Debussy’s opera Pelléas et Mélisande, based on Maeterlinck’s symbolist play, is a slippery task at the best of times. Doing so in a barely there staging, with the orchestra on the platform with the singers, is even trickier. For the opening performance of this summer’s Aldeburgh fes