The acoustician Derek Sugden, who achieved superb sound at Aldeburgh, Buxton and Glyndebourne, has died at 91.
An amateur in the highest English tradition, Derek was a structural engineer with a passion for music and buildings. He never acquired a qualification in acoustics, relying on his innate sense of what works in music.
Out of working hours, he was a habituee of chamber music at the Wigmore Hall.
Fine obit here.