US Patent 7,775,428

Systems and methods for generating, reading and transferring identifiers are disclosed. In one embodiment, a handheld system for associating a selected audio content with an object includes an identifier applied to a surface of the object and having a predetermined graphical format that is configured to encode the selected audio content, and a handheld device operable to encode the identifier and further operable to detect an audio content associated with the identifier.

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