Brief: The Philharmonic Orchestra of Hamburg is one of the best known orchestras in Germany. The goal was to give them a more modern image and pull more ears into their concert hall. We were asked to create an online solution that would arouse the curiosity of classical music lovers throughout the country.Solution:A web application that merges both city and orchestra into one unique musical experience. The city of Hamburg becomes the concert hall and users take the role of conductor. Utilising custom tailored motion tracking, users are able to select moving objects from a live video feed. People, ships, cars and even fish become instruments in a spontaneous concert.