By Jamie Davis-Ponce from the Sonicbids Blog. Last month, Facebook rolled out a new automatic audio tagging service a la Shazam, allowing people to use their smartphone microphones to automatically identify, tag, and share the music around them. From a musician's perspective, this is essentially a new way for fans to quickly identify your songs, share them with friends, and make purchasing tracks more seamless. For music marketers, the ability to track what music people are listening to creates new possibilities for learning about consumers' listening habits and targeting ads. However, automatic music tagging has raised some privacy concerns for...

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