More than 23,000 songs are identified each minute by Shazam and the app has been used over 70 billion times. But while using it is simple, a complex computation makes it possible. Apple purchased the company in 2018, helping Shazam become one of the most popular free music apps in the App Store. But how does Shazam actually identify songs?

WSJ explores the complex computations behind the app that quickly gives users results when they ‘tap to Shazam.’

0:00 Shazam’s audio fingerprint
0:27 The basic infrastructure
2:28 The breakthrough
4:07 Building the business

Tech Behind
'The Tech Behind' explores the amazing engineering, computing, science and algorithms that power our favorite tech.

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