Taking things a little further I wanted the machine to reflect my research into the mp3. The scale of the piano roll, particularly in contrast to the contemporary champion of audio formats became key. The mp3's success is due in no small part to its method of compression; so what better way to analyse that compression than by expanding this microscopic format across a 40ft piano roll. Now to even hold a single second of an mp3 on a 40ft roll requires a huge reduction in both sample rate and bit depth, particularly if you have to hand punch each individual hole, so to say an mp3 is encoded into the roll is certainly an overstatement. But, I think the analogy is clear even if the result is not quite so - yet it is distinguishable (more on this later). An irony that exists between the mp3 and the piano roll, that I think worth mentioning: the mp3 - obviously the higher definition recording but the piano roll by striking a physical string will vibrate an unrepeating analogue continuum, while the mp3 is confined to the same sound forever.