Allow clickable notes

[joereynolds]

You should be able to:

• - Click on Sa, Ri etc... and hear the note
• - Click on the formula 1 2 3 4... and hear the note
• - Click on the note C D E F... and hear the note

[joereynolds]

Thought of an easy-ish way to do this.
Give each one a data-note data attribute and then target that in the js kinda like

document.querySelectorAll([data-note]).foreach(() => {
    play the clicked note
});