Looks and sounds beautiful! I've been fascinated by the concept of automated musical instruments ever since I saw the self-playing piano at the Valley Fair mall in San Jose.

I can't believe you soldered directly to the ESP though! Seeing that gave me anxiety, haha.

Beautiful project! I love how it turned out and I'm impressed by the homemade solenoids.

I don't quite understand how the strikers work. Is there something magnetic attached to the top of the wood dowel?

Nice hack.

Two tangential complaints.

First, it sounds to me like the ninth note is off - it's lower than it should be.

Second, that page ate a huge chunk of my monthly mobile data allocation.

Twice. Because I made the mistake of clicking the image for the video, instead of opening it in a new tab. The page reloaded in full on the back button.