Universal Key

The universal key or universal scale is a concept employed in music theory in which specific notes or chord symbols in a key signature are replaced with numbers or Roman numerals, allowing for a discussion describing relationships between notes or chords that can be universally applied to all key signatures.

For example, in the key of E-flat major, the notes of the scale would be replaced like so:

  • E♭ becomes scale degree 1
  • F becomes scale degree 2
  • G becomes scale degree 3
  • A♭ becomes scale degree 4
  • B♭ becomes scale degree 5
  • C becomes scale degree 6
  • D becomes scale degree 7

Read more about Universal Key:  Triads (common Practice Style), Triads (jazz and Popular Style), Further Reading

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