Subdominant Chords

The video tutorial explains the subdominant function in music, focusing on the two and four chords. It highlights the importance of these chords in different music genres, such as classical and jazz. The tutorial discusses chord progressions, including the plagal cadence and the 251 progression, and introduces the Neapolitan chord. The subdominant's role in leading to the dominant or tonic is emphasized, with examples of how these chords function in various musical contexts.

Explain the relationship between the two chord and the four chord.

What is the Neapolitan chord and what function does it serve?