C♭ Minor is a musical key that consists of the notes C♭, D♭, E♭, F♭, G♭, A♭, and B♭. It is often used in classical music and is known for its dark and somber sound. The key signature of C♭ Minor has seven flats, making it one of the more complex keys to read and play. This key is the enharmonic equivalent of B Minor, meaning they sound the same but are written differently. C♭ Minor is less commonly used than other minor keys, but it appears in works by composers like Frédéric Chopin and Johannes Brahms, showcasing its unique emotional depth.