I fiddled around with the visualization and I managed to make it a bit more interesting. Such green! Much data! Wow! Other than that it's all the same old machine doing its thing with the sound.
Blog: https://electrondust.com/2018/07/22/s...
Here's the corresponding post on Reddit with a lot of interesting comments:
/ update_on_the_ball_bouncing_machine
This project is powered by an Arduino Nano (calculating the ball position) and an Arduino Uno (controlling the stepper motors).