What is d maj7?

D maj7 is a chord that consists of four notes: D, F#, A, and C#. It is a major chord with a seventh note added, which is the C#. The seventh note gives the chord a slightly more complex and sophisticated sound than a basic major chord. It is commonly used in jazz, rock, and pop music. The chord can be played on guitar, piano, or any other instrument capable of playing chords. When strummed, it produces a bright and uplifting feeling.