Respected accompanist for some of the greatest musicians of his day and author of literature on lieder interpretation and the art of accompanying.
He was unusually talented as a child and possessed perfect pitch, but did not fully embrace his gifts until his mid-twenties.
His farewell concert featured three of the singers with whom he had collaborated the most: Dietrich Fischer-Dieskau, Victoria de los Ángeles, and Elisabeth Schwarzkopf.
He was the oldest of four children. His father David Frank Moore owned a men's outfitting company.
He often gave witty and wise talks about accompanying, one of the first being for a Myra Hess lunchtime concert at the National Gallery.