Games played with the same opening will sound the same until they deviate from book moves. The perceived tempo of the music speeds up as pieces are captured. Enjoy!
The Web Audio API is a bit annoying and this would be better if it used an actual <audio> tag but alas Saturday mornings are only so long.
Created with python-chess and tone.js.
Source code here: https://github.com/charliemeyer/chessophone