I just heard about a group of students from Malmö University in Sweden that have created a system to convert barcodes into music. Once a barcode is scanned it is converted into an audio sample set on a timeline, this allows users to scan multiple items to create an entire composition. The following video shows the team of Interaction Design students and friends at a local grocery store testing out there project. It’s pretty cool, and you can see that the customer’s throughout the store thought so as well.
For additional information, the Barcode Beats site explains more about the process and includes a video explaining how the system works.