The music he could still imagine
Beethoven’s hearing faded over many years, rather than vanishing in a single moment. As it worsened, he relied increasingly on a skill composers develop through practice: hearing music in the mind. He knew how instruments sounded, how notes related to one another, and how musical ideas could be written down. A score could therefore be worked out on paper even when its sound could no longer be checked by ear.
That was not the same as composing without constraints. While he could still hear, Beethoven tested ideas at the piano and learned how different instruments behaved. Later, he had to lean more heavily on that experience, musical memory, and the rules of harmony and counterpoint—the ways melodies and parts fit together. He could revise a passage by studying the notes and imagining its effect, though he could not reliably hear the result in performance.
A public work he could not hear
The Ninth Symphony shows both the reach and the cost of this approach. Beethoven composed it after his hearing had become profoundly impaired. At its 1824 premiere, he stood with the performers and continued conducting after the music ended; someone had to turn him toward the audience so he could see its applause.
The episode makes the distinction clear: deafness limited his access to sound, but did not erase his command of musical structure. His later scores were built from knowledge accumulated over a lifetime—and from sounds he could still form in his imagination, even when the hall itself had gone silent.
