David Fallows (1990), 'Embellishment and Urtext in the Fifteenth-Century Song Repertories'

When Josquin was living in Cambrai and a singer tried to add to his music colores or coloratures that he had not composed, he went into the choir and scolded him severely with everybody listening: ,You idiot: Why do you add embellishment ? If I had wanted it I would have put it in myself. If you wish to improve completed compositions, make your own, but leave mine unimproved."