How the Heck?

https://perthirtysix.com/how-the-heck-does-shazam-work

How audio fingerprinting and a connect-the-dots trick lets Shazam identify a song in seconds.

Shri Khapalda's series of interactive explainers. Also:

• QR Codes
• GPS
• traffic lights
• synthesizers
• jpeg
• record players
• locks