This instructable will show you how to make any song or .wav file into a three-dimensional physical object that can be created with a mill, a 3D printer, or any other method you desire.
(Note: a huge shout-out to Carlo Sammarco for the Rhino and Grasshopper instructions and defintions, and to Devon Henry for Frequency Amplitude Quantifier.)
Step 1: DCLabs Website
Scroll down to the section about Audio in Rhino, and download the .zip.
This .zip will contian a Rhino definition, a Grasshopper definition, a program called 'Frequency Amplitude Quantifier', and a .pdf with more detailed instructions about how to work all of them.