The triad built on the subdominant note is called the subdominant chord. In Roman numeral analysis, the subdominant chord is typically symbolized by the Roman numeral "IV" in a major key, indicating that the chord is a major triad. In a minor key, it is symbolized by "iv", indicating that the chord is a minor triad.

Is the ii chord subdominant?

If you are already comfortable with Roman numerals, you can generally think of I, III, and VI as tonic, II and IV as subdominant, and V and VII as dominant.

Is subdominant an active chord?

Although there are seven different chords, they function in only three different ways, i.e. stable/resting (Tonic), active (Dominant), or half-active (Subdominant).