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What can a 35- millisecond moment in swing jazz tell us about our sense of hearing,

capacity for music, and even human consciousness?

Scientists have made a breakthrough discovery in what makes swing jazz swing.

It's a phenomenon that's so fleeting, even professional musicians can't point to it,

but we can feel it.

The results appear in

communications physics. I'm Joseph Palladuro, and you're listening to Science Quickly.

Swing is a subgenre of jazz, but the word swing also refers to a distinctive rhythm that

long outlasted the swing era, and to be heard in music from Chuck Berry and the Beatles to rage against the machine and the electronic project anomaly.

Here's a straightforward unswinging rhythm.

And here's a swing rhythm.

Swing rebelled against a straight 50-50 meter with a prolonged first beat or downbeat and a shortened second beat or offbeat.

This swing ratio can range from light, about 55%, to hard, around 72%.

In terms of feel, swing grooves.

It makes you want to move your body.

You'd think that swing ratio would be all there is to swing, but it's not.

...