Citation:
The subdominant function refers to the role that the fourth scale degree plays in tonal harmony, typically acting as a preparation for the dominant chord. This function creates a sense of movement away from the tonic and leads towards tension that is resolved by the dominant chord, establishing a harmonic progression that is fundamental to Western music. The subdominant often appears in various forms, including major and minor chords, and serves to enhance musical phrases through its relationship with both the tonic and dominant chords.