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Or they can install ultrasound beacons in the stores. They already have access to the microphone for obvious reasons.
by tzahola 9y ago
Or they can install ultrasound beacons in the stores. They already have access to the microphone for obvious reasons.
- amigoingtodie 9y agoNot even ultrasound, just correlate what everybody hears at the same time?
- lultimouomo 9y agoThey might just need one data point, if the playlist curator tells them the exact moment at which the song started.