Wagner's Chord That Began Modern Music...
Richard Wagner is renowned for his monumental four-opera cycle Der Ring des Nibelungen. His music is characterised by complex textures and rich harmonies. Unusually, Wagner chose to write the music and libretto of all his stage works.
His opera Tristan und Isolde is considered by many to represent the start of modern music for the way in which it explores atonality. Some believe that one radical chord marks the precise rupture with tradition, forever dubbed the Tristan Chord.
Then, turn to this recording to listen out for the Tristan Chord.