Composers added chromatic notes to their chords and melodies to make their music more expressive. In the slow movement of Sergei Rachmaninov’s Piano Concerto No. 2, the opening flute melody ...

A cadence is formed by two chords at the end of a passage of music. Sometimes the final cadence of a piece in a minor key ends with a major chord instead of the expected minor. This effect is ...

These chords are used on everything from The Beatles to Billie Eilish, and every genre of music that adopts any form of basic harmony.