‘Bop Spotter is a real-time collector of songs played by passersby in San Francisco’s Mission District. Installed inside a box high up on a pole, a phone runs Shazam nonstop. The music discovery app allows users to look up an artist and song title by simply recording a few seconds of sound.

Solar powered with a microphone pointing down on the street, the phone pings every few minutes, detecting music and automatically integrating the tunes into a diverse and ever-growing playlist on the Bop Spotter site. So far, more than 1,400 songs have been collected, ranging from rock to hip top to meditation sounds…’ (Kate Mothes via Colossal)