Auto Shazam first launched in may on the iPad, allowing users to auto match music using the service. A feature which has now available on the iPhone and the iPod Touch for both free and Encore Shazam users on both devices, the update turns devices into always-listening music matching devices.
This helps to fight the problem of missing a song within those last few seconds, allowing you to match a track from something like a TV advert without even touching your phone or tablet, with the app working in background even when the screen is locked.
When a match is made, the song or TV advert will be added to your collection, ordered by date, however Shazam’s TV show features only work fully in the US, and in order to use the feature you will need to turn it on in the settings.
To use the feature, just download the app from the iTunes App Store.
Source: iTunes App Store