Bop Spotter is an interesting little curio; take an Android phone, set it to run Shazam on a loop, and then hide it somewhere (in this case San Franciscos’s Mission district) with a solar panel attached and suddenly you have the the culture-tasting equivalent of ShotSpotter, generating the unique soundtrack to a particular location. San Franciscos’s Mission is, of course, a very particular environment with a distinct feel too it, so it’d be interesting to see how it would contrast with other locations around the world – though I do suspect that most would end in the brief bang of a controlled explosion.