How to create particles on a spherical surface with Processing.

It is how to create a doughnut shape using trigonometric functions. As you read the code, think about where math is used.

This is a visual representation of sound using Processing, using the FFT (Fast Fourier Transform) values of Processing’s Sound library to draw sounds as if you were writing a musical score. You can replace the sample.wav part in the code with any sound you like and play it back with different values.