It was 7:51 a.m. on Friday, January 12, the middle of the morning rush hour. In the next 43 minutes, as the violinist performed six classical pieces, 1,097 people passed by. Almost all of them were on the way to work, which meant, for almost all of them, a government job. L’Enfant Plaza is at the nucleus of federal Washington, and these were mostly mid-level bureaucrats with those indeterminate, oddly fungible titles: policy analyst, project manager, budget officer, specialist, facilitator, consultant.

Each passerby had a quick choice to make, one familiar to commuters in any urban area where the occasional street performer is part of the cityscape: Do you stop and listen? Do you hurry past with a blend of guilt and irritation, aware of your cupidity but annoyed by the unbidden demand on your time and your wallet? Do you throw in a buck, just to be polite? Does your decision change if he’s really bad? What if he’s really good? Do you have time for beauty? Shouldn’t you? What’s the moral mathematics of the moment?

On that Friday in January, those private questions would be answered in an unusually public way. No one knew it, but the fiddler standing against a bare wall outside the Metro in an indoor arcade at the top of the escalators was one of the finest classical musicians in the world, playing some of the most elegant music ever written on one of the most valuable violins ever made. His performance was arranged by The Washington Post as an experiment in context, perception and priorities — as well as an unblinking assessment of public taste: In a banal setting at an inconvenient time, would beauty transcend?

The musician did not play popular tunes whose familiarity alone might have drawn interest. That was not the test. These were masterpieces that have endured for centuries on their brilliance alone, soaring music befitting the grandeur of cathedrals and concert halls.

The acoustics proved surprisingly kind. Though the arcade is of utilitarian design, a buffer between the Metro escalator and the outdoors, it somehow caught the sound and bounced it back round and resonant. The violin is an instrument that is said to be much like the human voice, and in this musician’s masterly hands, it sobbed and laughed and sang — ecstatic, sorrowful, importuning, adoring, flirtatious, castigating, playful, romancing, merry, triumphal, sumptuous.

So, what do you think happened?

HANG ON, WE’LL GET YOU SOME EXPERT HELP.

Leonard Slatkin, music director of the National Symphony Orchestra, was asked the same question. What did he think would occur, hypothetically, if one of the world’s great violinists had performed incognito before a traveling rush-hour audience of 1,000-odd people?

Here is the link to the entire story on the Washington Post website.