D Minor is a musical key that is often associated with a somber or melancholic mood. It consists of the notes D, E, F, G, A, B♭, and C, forming a natural minor scale. This key is frequently used in various genres, including classical, jazz, and popular music, to evoke deep emotions. Many famous compositions are written in D Minor, such as Beethoven's Piano Sonata No. 17 and Bach's Toccata and Fugue in D Minor. The key's unique sound makes it a popular choice for composers looking to express feelings of sadness or introspection in their music.