In February 2021, Lars Vogt probably should not have traveled to Bremen, Germany, to join his close friends, the violinist Christian Tetzlaff and his sister, the cellist Tanja Tetzlaff, in recording Schubert’s Piano Trio No. 2 in E flat. Vogt, a widely beloved pianist and a conductor on the rise, arrived in pain; his doctors had asked him not to go, but to check into a hospital to await a conclusive diagnosis of the cancer that would take his life, at just 51, last September.

Instead, Vogt sat down at a keyboard.

“He did the most incredible things,” Christian said in an interview, adding that Vogt, his colleague of 26 years, suddenly played as if he had reached a kind of fulfillment or liberation. “Even on a technical level,” he continued, “I’d never heard him in this kind of perfection, exuberance, lightness. He was everything at the same time.”