Music notation with abc.js

ABC notation is a plain-text way to write music. A project render hook (render-codeblock-abc) feeds an abc fenced code block to abc.js, which engraves the score and adds a play button — all in the browser, from text in your post.

A simple tune

A scale, with a different key and metre

Press play on either score to hear it. The notation stays plain text in your Markdown, so it diffs cleanly and survives any platform — the rendering and the audio are added by the reader’s browser, not baked into a file.