This is the song, Comptine d`un autre ete - l`apres-midi, from the film, Amelie (2001), played by me on a keyboard.
The accompanying video is from a molecular dynamics simulation code that I wrote as an applied physics graduate student. The program simulates cylindrical disks of different sizes that are compressed between two circular walls. My program reads in an audio file and, whenever the sound reaches a threshold volume, it chooses five disks at random and flicks them in a random direction with a random force. The disks respond as they would in real life, according to the laws of physics, but what is visualized is much more than would be available to the naked eye.
You'll notice that there are three different types of color-coding used to create this video.
The different color-coding schemes are as follows (in order of appearance):
1) Force chains (first appearance at 0:15) - the disks are color-coded based on the amount of stress they experience (black being the least amount of stress, red being medium, and white the largest amount of stress).
2) Velocity magnitude (first appearance at 0:45) - the disks are color-coded based on their speed (black being the slowest, then purple, then white as the fastest)
3) Disk radius (first appearance at 1:05) - the disks are colored different shades of blue/purple based on their size
I weave in the three different color-coding schemes to show the richness of activity happening in this system. I find these visualizations to be rather stunning and mesmerizing. Combining the simulation with the rhythm of the music joins the transcendent, boundless spirit of art with controlled, yet elegant, laws of physics. Through this process, the rigid and deterministic gives way to free-flowing beauty and wonder, and it's the music, not the physics, which provides the measured beat.
For more videos and information about my work, browse around my website AmirMaghsoodi.com