Alex Chen has turned the iconic 1972 NYC subway map (by Massimo Vignelli)…

Massimo Vignelli NYC subway map

…into a piece of visual and musical art, called, “Conductor”.

Some of the routes have changed. All of the lines fade out over time. But the general idea is that the trains move by the minute according to their schedule over a 24 hour period, and when one crosses over another, it creates a sound, as if each line were a string being plucked. Full description here.

See a video of the program in motion below, then go to for an interactive version of the map-strument.