Aguilar, Gaspar de
- F.J. León Tello
(fl 1st half of the 16th century). Spanish music theorist. He wrote a treatise Arte de principios de canto llano (published between 1530 and 1537/R); it is a conventional work following traditional lines, limited to purely technical aspects of liturgical chant. He regarded the B♭ as a necessary accidental for chant based on F to avoid the melodic tritone and gave rules for the use of plicas; he also categorized intervals according to their effect on the senses, and rejected the Pythagorean classification. Aguilar seems to have been familiar with the writings of his contemporaries, citing Juan de Espinosa and Francisco Tover among Spaniards, Nicolò Burzio, Giacomo Fogliano and Gaffurius among Italians. His quotations are more accurate than those of most writers and add considerably to the merit of the work....