Turn your speakers on and listen up – it's experiment time. Sometimes, the only thing separating speech from music is repetition, and the speech-to-song illusion proves it.
You can make any person's regular speaking voice seem to burst into song with a fairly simple trick. It's called the Speech-to-Song illusion. But can you do it if they're speaking another language? Or if you deliberately tweak their voice? Find out how to make people sing on your iPhone, and how they can make you…
Diana Deutsch is a professor of psychology at the University of San Diego, and a master at manipulating people's ears. While researching quirks in the way humans hear things, she has invented many auditory illusions. Here are some of the weirdest, and why they work.