The C minor 7 chord, often written as Cm7, is a four-note chord that consists of the root note C, the minor third E♭, the perfect fifth G, and the minor seventh B♭. This chord is commonly used in various music genres, including jazz, blues, and rock, to create a rich, emotional sound. In music theory, the C minor 7 chord can be derived from the C natural minor scale, which includes the notes C, D, E♭, F, G, A♭, and B♭. The addition of the seventh note gives the chord a more complex and nuanced character, making it a popular choice for musicians looking to add depth to their compositions.