Newslink: Google brings its AI song recognition to Sound Search

Google's Now Playing song recognition was clever when it premiered late in 2017, but it had its limits. When it premiered on the Pixel 2, for instance, its on-device database could only recognize a relatively small number of songs. Now, however, that same technology is available in the cloud through Sound Search -- and it's considerably more useful if you're tracking down an obscure title. The system still uses a neural network to develop "fingerprints" identifying each song, and uses a combination of algorithms to both whittle down the list of candidates and study those results for a match. However, the scale and quality of that song matching is now much stronger.

https://www.engadget.com/2018/09/15/google-now-playing-in-sound-search/