How to write the function notation of triad?

1. In classical harmony, the tonic triad is marked as T, the subordinate triad is marked as S, and the dominant triad is marked as D.

2. The chords from level 1 to level 7 are: T, SⅡ, DTⅢ, S, D, TSⅥ, DⅦ.

3. For minor chords, use lowercase letters: t, sⅡ, dtⅢ, s, d, tsⅥ, dⅦ.

4. Use Roman numerals to mark the series, ⅠⅡ Ⅲ Ⅳ V Ⅵ Ⅶ Extended information triad In the major and minor harmony system, three tones are superimposed according to the third degree relationship, which constitutes a triad.

This is the most common chord form in major and minor harmony.

A triad is a chord composed of three tones superimposed in thirds, or a "triad".

Each note that makes up a chord has a name: Root note: The bottom note of the chord.

This note is the base of the chord and is at the lowest position in the original arrangement of the chord.

Third: The third above the root note.

The middle position in the original arrangement of triads.

Fifth tone: The fifth tone above the root note is called the fifth tone.

The highest position in the original arrangement of triads.

Each degree of the scale can be used as the root note, and the third and fifth notes are added above it to form a triad. Each chord is named according to the name of its root note on the scale.