This classic pairing was made in chamber music heaven. Newly remastered, Ma and Ax's 1991 recording is a cinch for the essentials shelf if it somehow passed you by.
"Extremely beautiful performances…. While totally faithful to the letter of the score, i.e. without self-indulgence, Yo-Yo Ma and Emanuel Ax somehow manage to banish the image of a doggedly burly, bearded upholder of classical tradition in favour of an acutely romantic and vulnerable human being. Yo-Yo Ma's lyrical cello has an incandescent intensity."—Gramophone