James Blish's "A Work of Art". maybe.
In the year 2161, a new medical specialty has been developed, known as "Mind Sculpting." Human personalities from history are re-created and placed into voluntarily donated physical bodies. Two mind sculptors, Drs. Kris and Seirds, re-create the mind of Richard Strauss and place it in a body. After animation, the "new" Dr Strauss is encouraged to re-commence his life as a composer of music, which he does.
....
The applause, when it comes, is not for him, but for the mind sculptors, and Strauss realises that it was all an experiment. Before the sculptors pronounce the formulation that will destroy the re-created mind and restore the mind of the donor – a man completely devoid of musical ability – he feels the satisfaction that the sculptors will never know that the music lacked any spark of genius: "the 'Strauss' [they] had created was as empty of genius as a hollow gourd." His final regret is that he will not now be able to set to music Personae, a poem by Ezra Pound appropriate to the occasion that he had just discovered.
ISFDB entry