mDecks has created the amazing Circle of Vths Decoder. This interactive page shows circle of fifths relationships for multiple scales. Along with diatonic scales and medieval modes, you can decode:
- Messiaen modes
- Indian ragas
- Blues scales
- and more...
If you want to see structural harmonic relationships using either keys or function (letter names or roman numerals), check out this
Circle of Vths Decoder. I will use this graphic tool to build chords idiomatic to certain harmonies + to spur intriguing modulations.