TungTTA few days after finishing the post about my Firework simulation in Python, I suddenly felt like this project was a bit too simple. So the engineer in me kicked in, and I started improving it by syncing the fireworks to the beat of the music.
The physics behind a single firework is still the same as before, I just added an audio analysis step before running the simulation:
- Read the audio file and extract its volume envelope to find the beats (onsets) - moments where the volume rises sharply - while also splitting the spectrum into frequency bands to know which band is strongest at any given moment.
- Build a firework launch schedule from those beats: each beat maps to one or a few fireworks, launched from the position of whichever band is currently strongest, with the launch time worked backward so the explosion lands right on the peak of the beat.
- Add an equalizer strip running along the bottom of the screen, flickering along with each frequency band, so the visuals and the music line up.
The source code has been updated at Tung-hehe/fireworks-simulator.
Update: Part 2.
Happy coding!
