Trane is a collective, algorithmic composition environment. By laying out tracks, setting down notes, and distributing trains, users create a rail network that doubles as a live musical score. 64 * 64 switches, each with four randomizable directions, can be interactively redefined into intricate circular musical scores. By placing trains and notes on the network while the others run, melodies can be modified in real time. As more and more alternative routes are drawn, each with their own set of notes, infinitely varying, generative music becomes possible inside of a network of gates and switches ressembling a digital circuit.