SoundHound offers instant music search and discovery. It can name a song playing from a speaker in as little as four seconds - and even works if you sing or hum! Get lyrics and top songs for all of your favorite artists. The free version of SoundHound is ad-supported. More info »
SoundHound offers an unlimited number of song identifications, while Shazam limits you to 5 a month. So I would go with SoundHound.
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