This one, and a couple more:
codecIntro.mp4
The blog post is here.
Animations created using Motion Canvas.
Run npm install and then npm start to start the editor.
To generate the waveform visualization:
uv run --script waveform_visualizer.py assets/justin-master-class-3s.wav -o assets/waveform_gray.png -w 2000 -ht 250 -s 0.08 -c '#9e9e9d'
imgcat assets/waveform_gray.pngThe audio waveform is from audio from this sketch.