Acoustic fingerprinting is now available on many mobile smartphones.
You have probably seen the basic scenario in television commercials many even tried it in person.
A user holds up a phone to capture a few seconds of audio playing nearby, and the application computes a "fingerprint" of the track, which is then used to query a remote database for the mystery artist and track name.
The space has been dominated by proprietary software, but a new open source project was unveiled last week, Echoprint.
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