QR codes are those pixellated patterns you increasingly spot in newspapers/magazines and billboard posters. They are being increasingly used to market music by offering people with smartphones a swift and direct way to access on-line media, exclusive content etc.
Check out this explanation:
http://www.knowthemusicbiz.com/music-marketing-with-qr-codes-by-david-rose/
And this innovative case study:
http://adsoftheworld.com/media/online/zoo_records_hidden_sound_campaign?size=_original
We'll discuss further in our 'MediaGenius' meeting TUESDAY lunchtime.
