At first, I just want to say thank you for the very useful tool I've been using for a while now.
Being also a software engineer as well as a music theory fan I've made a small PoC on top of your service. You can find a link to the screen capture down below.
The idea was inspired by YouTubers who produce video analysis of different kinds of songs from the perspective of musical harmony.
Hopefully, you'd like the idea and release such a feature in the following versions of your great service.
Feel free to reach me out if you have any questions.
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