A microphone in the Mission district of San Francisco is constantly using Shazam to detect and log music being played on the street. The project, called Bop Spotter, provides a real-time feed of popular music in the area and has logged over 7,885 Shazams. The data is available for download as a CSV file. The project is described as a form of 'culture surveillance' that captures the musical tastes of the community.