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 stop.
Last week I wrote about audio illusions, among them a rather common (if not well-known) Speech-to-Song Illusion. The illusion is simple and often we stumble on it by accident. A recorded speech — not a song — runs into technical error and repeats a few seconds over and over again. As we hear it repeat, it begins to take on a musical tone. When the speech is replayed in full, and we get to those few seconds that we heard so many times, the speaker seems to have suddenly, for a few seconds, started singing.