. Before this, theorists viewed these as entirely different intervals above a bass note.
: Rameau argued that every chord has a "root" or fundamental note, regardless of which note is in the bass. This allowed for the identification of a core harmonic identity. Treatise on Harmony
: He established the "natural" relationship between chords, particularly the movement between the tonic and the dominant , which remains the backbone of most Western music today. Structural Breakdown . Before this