So what is the 'real' music—composer, conductor, or listener?

Just like optical illusions trick our eyes, audio illusions can trick our ears. It makes scientists wonder: What exactly are we hearing, when we're hearing?

This is the first episode of our new four-part series, The Sound Barrier.

Guests: Diana Deutsch, emeritus professor at the University of California, San Diego; Matthew Winn, professor at the University of Minnesota; Michael Chorost, science writer

You can find more of Diana Deutsch’s auditory illusions at https://bit.ly/3Mdh6H4

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