Chess You Can Hear is a free Chrome extension developed by alexfmedoff. It adds sound effects to your online chess games on lichess.org, enhancing the overall experience. As you play a game, the extension follows the moves in real-time and plays chords and notes that reflect the mood of each individual move. The developer has provided the code for this applet on GitHub for those interested in exploring it further.

Although Chess You Can Hear is still in its first build, it offers a unique and enjoyable way to immerse yourself in the game. However, it's worth noting that there may be some bugs and areas for improvement in this initial version. Nonetheless, if you're looking to add an extra layer of ambiance to your online chess matches, this extension is worth checking out.

Please note that any feedback or suggestions should be directed to the developer through appropriate channels.