San Francisco software engineer Riley Walz's Bop Spotter runs the song identifier app Shazam to quietly listen in on what music passersby are listening to in the city's diverse Mission District.

On a recent morning near a San Francisco public square, Riley Walz climbed a tall ladder on a spying mission with a single, silly goal: to capture the musical vibes. With a phone running the song ...

Bop Spotter is recording a street in San Francisco's Mission neighborhood, creating a playlist of songs using a $100 apparatus and Shazam software. "Not Like Us." SF Gate Logo Hearst Newspapers Logo ...

San Francisco's Mission District has a new secret DJ, and it's not spinning decks—it's eavesdropping on every song that drifts through its streets. There’s a musical spy lurking above San ...

A San Francisco man has a new spin on surveillance technology. ... RILEY WALZ: This is Bop Spotter. It's like a living time capsule in real time of what songs are playing.

The online playlist, Bop Spotter, shares what music is being played in San Francisco's Mission District by Shazaming it in real-time.

Technology. A San Francisco Coder Built a Musical Surveillance System With a name inspired by a controversial police surveillance technology, Bop Spotter scans the streets for ambient tunes.

The Bop Spotter, a “crappy Android phone” and a microphone, are on a pole at an undisclosed location. More than 200 songs have ... she enjoys foggy San Francisco mornings with her cat, Sally Carrera. ...