dean (cathedral), 169 , 170
debate-song (tenso), 115 –16, 121 , 226
De bone amour vient seance et bonté (Thibaut), 118 –19
Debussy, Claude, 152 , 349
decadent style. See mannered style
Decameron (Boccaccio), 365 –66
deceptive cadence, 603 –4
decimal system, 252 , 253
declamation, 612 , 646 , 680 , 712 , 720 , 722
declamation motet, 429 , 430 , 432 , 433 , 566 , 567 , 577 , 603
decoration. See ornamentation
De harmonica institutione (Hucbald), 77
De institutione musica (Boethius), 38 –39, 37 , 39
De inventione et usu musicae (Tinctoris), 453 –54, 536
Delphic Hymns, 32 , 33 , 799
De mensurabili musica (Garlandia), 196 –98
De mensuris et discantu. See Anonymus IV,
De modis musicis antiquorum (Mei), 799
De musica (Augustine), 37 –38, 175 , 337
De musica (Grocheio), 207
De musica (John of Afflighem), 155
De numeris harmonicis (Gersonides), 249
Deo Gratias, 310 , 316
Deo gratias Anglia (“Agincourt Carol”) (“Roy Henry”), 418 –21
De plan musica (Garlandia), 196
descant, English, 155 , 406 –9, 417
Beata viscera example of, 406 –7, 433
distinguishing features of, 423 , 425 , 429
See also discantDescartes, René, 797 –98
descending fifths, 733
descending seconds, 356
Deschamps, Eustache, 336 –37, 343
deschaunte, 436
descort, 113 , 119
Desiderius, King of the Lombards, 3
despotism. See absolutism