Musician known for her work in chamber music and lieder, as well as her longtime collaboration with baritone Wolfgang Holzmair.
She had many famous teachers as a student, including Kathleen Long, Jacques Fevrier, and Alfred Brendel.
She was named CBE on the 2007 New Year Honours List.
Her father was musicologist Martin Cooper.
She gained recognition for her mastery of Robert Schumann and Franz Schubert.