Patent ID: 7650197

Claim:
A method of enabling recorded audio to be associated with a position on a surface, said surface having a plurality of tags printed thereon, each tag encoding an identity of said surface and a location of that tag on the surface, said method comprising the steps of: sensing at least one tag by interacting with the surface using an optical sensing device, said sensing device comprising a microphone; recording audio using the microphone; determining a first position of the sensing device relative to the surface using the sensed tag; communicating, to a computer system, the identity of the substrate, position data indicative of the position of the sensing device and audio data corresponding to the recorded audio, thereby enabling said computer system to associate said audio data with said position and substrate; sensing at least one tag by interacting with the surface using the optical sensing device; determining a second position of the sensing device relative to the surface using the sensed coded data; communicating, to the computer system, position data indicative of the second position of the sensing device and the identity of the surface; receiving by the sensing device and from the computer system audio data associated with said second position and surface, said audio data corresponding to said recorded audio if said second position corresponds to said first position on the surface; and playing back by the sensing device the received audio data through a speaker of the sensing device.