Primary Triads (I, IV, V)
Understand the function of the three fundamental triads supporting the harmonic framework of any key signature.
The Pillars of Tonality
Triads built on the 1st degree (Tonic - I), 4th degree (Subdominant - IV), and 5th degree (Dominant - V) are known as Primary Triads. Together, these three triads contain every single scale degree of the diatonic scale, establishing the most solid harmonic foundation in music.
The Fundamental Harmonic Triptych
I, IV, and V articulate the core narrative of tonal music: the Tonic (I) represents home and absolute resolution, the Subdominant (IV) opens the horizon journeying outward, and the Dominant (V) unleashes the strongest gravitational pull driving the resolution home.