About: 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