Musical Circle of Thirds
circleofthirds.com
Explore chords, scales, and intervals with an interactive musical circle. Learn music theory through visual and audio exploration.
This is an automated archive made by the Lemmit Bot.

The original was posted on /r/InternetIsBeautiful by /u/dooatito on 2025-09-23 12:59:33+00:00.

Hi everyone, I made this site to play and visualize chords, and explore musical concepts such as scales and intervals. It’s completely free, I made it as a side project.

It’s a first draft with several experimental features. It’s optimized for desktop, rather than mobile.

You can simply hover notes to play chords, and select other chord types on the left. You can even plug in a MIDI keyboard or use the computer keys as input.

Hope you have fun with it, suggestions for improvements welcome!

Cheers