https://musiclab.chromeexperiments.com/Spectrogram/
https://github.com/googlecreativelab/chrome-music-lab/tree/master/spectrogram
I did a simplyfied version because i got lots of errors while "compile".
"Compile" also needed >100MB of additional node_modules.
I just wanted that nice looking 3D Sonogram for another project and i wanted it small and easy to use.
So my goal was to reduce it and get rid of JQuery because it was mostly used to access UI elements.