a soundtrack for the city? have you ever heard about it?

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hi there,yesterday i was outside with my girlfriend in the italian city of Sondrio, it's a small small city in the north of italy, we were walking and suddendly i started to heard music, firtsly i thinked "maybe is a local or a restaurant with music, but the music was the same everywhere, and i understood that the music was in all the city, in the wall on the street of every buildings there was a speaker, sppeakers everywhere, all connected to a central computer in the city center. Have you ever seen such things? where? do you think that is a good idea to make walk more enjoyable? thank you for your responses