Soprano Johanna Vargas and composer Julian Lembke use the organ pipes during the chord change ceremony./Credit:	Matthias Bein/picture alliance/dpa/Getty Images

Soprano Johanna Vargas and composer Julian Lembke use the organ pipes during the chord change ceremony./Credit: Matthias Bein/picture alliance/dpa/Getty Images

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World's slowest musical composition changes chord for first time in seven years

A musical composition designed to take well over 600 years to play has gone through its first chord change in seven years