A great new concept has been developed in the application Oh Music, Where Art Thou.
The application Oh Muci, Where Art Thou presents a new navigation system for cyclists using music played back through the user’s headphones as a beacon for navigation. The source of music is artificially shifted in the direction of the desired destination, so the user’s sense of orientation is employed to give a clue about the direction.
Source picture: http://www.usinet.nl/omwat/
Read more about it here and check where you can download the software