The ayacachtli was a rattle formed of a jar of earthenware or a dried gourd containing pebbles which was fastened to a handle, and served to mark time in the songs and dances. An extension of this simple instrument was the ayacachicahualiztli, "the arrangement of rattles," which was a thin board about six feet long and a span wide, to which were attached bells, rattles and cylindrical pieces of hard wood. Shaking this produced a jingle-jangle, agreeable to the native ear. The Aztec bells of copper, tzilinilli, are really metallic rattles, like our sleigh bells. They are often seen in collections of Mexican antiquities. Other names for them were coyolli and yoyotli.
Various forms of flutes and fifes, made of reeds, of bone or of pottery, were called by names derived from the word pitzaua, to blow (e.g., tlapitzalli, uilacapitzli), and sometimes, as being punctured with holes, zozoloctli, from zotl, the awl or instrument used in perforating skins, etc. Many of those made of earthenware have been preserved, and they appear to have been a highly-esteemed instrument, as Sahagun mentions that the leader of the choir of singers in the temple bore the title tlapitzcatzin, "the noble flute player."
Large conches were obtained on the seashore and framed into wind instruments called quiquiztli and tecciztli, whose hoarse notes could be heard for long distances, and whistles of wood, bone and earthenware added their shrill notes to the noise of the chanting of the singers. The shell of the tortoise, ayotl, dried and suspended, was beaten in unison with such instruments.
Recent researches by competent musical experts conducted upon authentic specimens of the ancient Mexican instruments have tended to elevate our opinion of their skill in this art. Mr. H.T. Cresson, of the Academy of Natural Sciences, Philadelphia, has critically examined the various Aztec clay flutes, whistles, etc., which are there preserved, and has reached the following conclusions:—
"I. That upon the four-holed clay flageolets the chromatic and diatonic scales can be produced with a full octave.
"II. That the clay whistles or pitch pipes, which may be manipulated in quartette, will produce an octave and a fourth.
"III. From the facts above shown, the Aztecs must have possessed a knowledge of the scales as known to us, which has been fully tested by comparison with the flute and organ."[34]
This result indicates for the instrumental accompaniment a much higher position in musical notation than has hitherto been accepted.