Leo Burnett won a Gold Medal at this years Cannes Advertising Festival for its ‘Hidden Sounds’ QR Code campaign promoting 14 indie bands (the hidden sounds) for Zoo Records, an alternative music store in Hong Kong. The QR Codes were assembled into the shapes of animals that live hidden in the city and posted all over the streets of Hong Kong. Scanning the codes in the animals allowed users to read more information about a band and hear their music. They could also purchase the songs directly as well as share them on social media. The campaign was considered a success by the volume of sharing on blogs and social networks and the fact that more than half of the 14 bands sold out their albums within the first week. The video below shows elements of the campaign with an English commentary, starting at the 30sec mark.