Shazam has just updated its free Shazam iOS app, along with the $6.99 Shazam Encore and (Shazam) RED, adding Twitter previews for shared music tags, faster song recognition for older iDevices, and improved tagging in noisy environments.

As you can see, music tags shared from within the application to Twitter now include media previews of the Shazam-tagged song, allowing followers to listen to a section of the song over at Shazam’s website, and to purchase and download the track from iTunes:

In addition, iDevice users will find that Shazam 6.2.1 tags music a whole lot faster – especially when the application is running on an iPhone 3GS or iPhone 4.

Further changes include improved music recognition in challenging environments, and more “dynamic” explore charts. Finally, Shazam notes that “new TV experiences” have been added in the latest update, though this feature has yet to be announced and so far remains something of a mystery.

As mentioned, Shazam’s three iOS apps - ShazamShazam Encore, and (Shazam) RED - can be downloaded in the App Store now for free (Shazam only), or for $6.99. All three applications have been updated to version 6.2.1.

Check out the recently updated applications now, or for more of our recent app news, see: Next Issue Now Includes Over 100 Digital Magazine Titles For One Monthly PriceBaldur’s Gate II: Enhanced Edition To Launch For iOS, Too, and Deck Up! Dominion Card Game Set To Launch For The iPad This Fall.