The stage of the Felsenreitschule, a theater carved from the side of a mountain in Salzburg, Austria, is about 130 feet wide. During concerts, artists come out from catacombs at the side, beginning a walk to the center that, depending on nerves, can feel punishingly long.

The 21-year-old violinist María Dueñas made that journey under the spotlights for her debut at the prestigious Salzburg Festival one night this summer. But, instead of nerves, she felt comfort the moment she saw the seated orchestra.

“I could tell, that I was in a safe space,” she said the next morning over coffee.

She looked beyond the lights to the full house, taking in the audience’s energy. Once she found her place, nestled in the semicircle of the Vienna Radio Symphony Orchestra, she raised her bow and let out a steady, then soulful open G at the start of Bruch’s First Violin Concerto. During the slow second movement, she listened to the hall as she played and noticed that she couldn’t hear people breathing.

“That, for me,” she said, “is a very good concert.” Stunned silence is common at performances by Dueñas, who, in an industry always eager for the next prodigy, has emerged as something particularly special: a strong-willed young artist with something to say, and the skill to say it brilliantly.