The French-born pianist Helene Grimaud is among the most gifted pianists of her generation. The forty-something-year old is not only blessed with great musical ability, but also with some extraordinary mental powers.
She experiences synesthesia, a condition that causes the physical senses to overlap. In Grimaud's case, this manifests itself as an ability to see and touch music. In practice, this makes it possible for her to rehearse without a piano and still fully experience the music.