3D Printed Record

I’ve created a program for converting digital audio into a 3D model of a 33rpm record and 3D printed some functional prototypes.  These records play on standard turntables with regular needles, just like any vinyl record.  The audio on the records is very low resolution, it has a sampling rate of 11kHz (a quarter of typical mp3 audio) and 5-6bit resolution (less than one thousandth of the resolution of typical 16 bit audio), but the result is easily recognizable.  Find my Processing code, 3D model downloads, photos, and a detailed discussion of the design process on Instructables: