Mastering scale degrees is the foundation for playing by ear and reharmonization. Each degree in a major scale has a specific role:
- 1 (I) – Tonic: The stable "home" of the piece.
- 2 (ii) – Supertonic: Often leads to the dominant (ii-V-I connection).
- 4 (IV) – Subdominant: Builds tension moving away from the center.
- 5 (V) – Dominant: Strong tension that demands resolution.
- 6 (vi) – Submediant: The relative minor key, often used for emotional turns.
This knowledge is the secret to ear-based playing and professional arrangements.