Edited sentence: "(1977, p.As Jim Samson explains, "Clearly any comparison of medieval and modern modality would recognize that the latter takes place against a background of some three centuries of harmonic tonality, permitting, and in the nineteenth century requiring, a dialogue between modal and diatonic procedure.ISBN 0460861506.Music in Transition: A Study of Tonal Expansion and Atonality, 1900-1920.Samson, Jim (1977/1995).The use and conception of modes or modality today is different from their use and conception in early music