I've always struggled with scales and modes so I made this tool for myself a year ago.
The chromatic circle of notes (not the circle of fifths!), with a movable pattern overlaid on top to show the relevant notes in a given scale.
Click the "mode name" to hear it played out loud.
Notation (treble, alto, and bass) and tablature (guitar and mandolin) are also shown.
(That was 600 individual images I had to generate and link!)
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