The 6th Note Players is an interactive art exhibit that uses the program Max 7 to combine four seperate subway performers, playing different musical instruments in the song, "New York Groove" by Ace Frehley.
The Artists were recorded against a blue screen.
To further interactivity, several different background plates of active subeay platforms were recorded as well.
The way that users interact with the system is with a keyboard MIDI Controller that alternates who and where the artists are playing and in one set, you can have all the subway performers perform at once, though they were never in the same room togather.
The user is also provided a bucket drum to drum along to the performer and by pressing one of the drum buttons, you can also hear a short interview with the subway performer.
A Short explanation of the project can be found here