San Francisco's Mission District is now under 24/7 musical surveillance SFGATEA hidden microphone on a San Francisco street pole is spotting ‘bops’ in the wild TechCrunch‘Bop Spotter’ Is a Secret Phone Eavesdropping on the Mission’s Music Tastes KQEDConceptual art project secretly Shazams the Mission’s musical taste The San Francisco StandardWhat are people listening to in The Mission?