What’s the quietest thing you’ve ever heard in music?

Not a silence, exactly—more like the breath between phrases when the orchestra stops fighting and just… stays. I was conducting a rehearsal last night, and halfway through a slow movement, the third clarinet played a note that wobbled. Not a mistake. A tremor. And for three seconds, the whole room held its breath. It wasn’t perfect. But it felt true. What’s the quietest thing—sound or absence—that’s ever moved you?