reharmonisation

/riˌhɑrmənɪˈzeɪʃən/
noun
  1. The process of changing the chords or harmony of a piece of music to create a new arrangement.
    • The composer's reharmonisation of the old folk song gave it a fresh, jazzy feel.
    • In music theory class, we studied the reharmonisation of a simple melody into a complex chord progression.
    • The band's reharmonisation of the classic hit made it sound completely different from the original.