"The Lost Chord" is the title of an 1877 song composed by Arthur Sullivan.
The Lost Chord may also refer to: The Lost Chord (1917 film), a British film by Wilfred Noy The Lost Chord (1911 film), an Australian film by W. J. Lincoln The Lost Chord (1925 film), a lost American film by Wilfred Noy The Lost Chord (1933 film), a British film by Maurice Elvey "The Lost Chord" (The Worst Witch), a 2001 episode of The Worst Witch "The Lost Chord", a 2020 episode of the web series Song Machine by Gorillaz featuring Leee John In Search of the Lost Chord, an album by The Moody Blues, released in 1968 The Harmonic seventh chord