Enneachord

"But Aristoxenus calls the following foreign instruments — phœnices, and pectides, and magadides, and sambucæ, and triangles, and clepsiambi, and scindapsi, and the instrument called the enneachord or nine-stringed instrument."

"For while we are used to simply dividing modes internally in terms of fifths and fourths to make an octave, Jacques complicates matters for us by introducing concepts from the monochord in Liber V, thus enneachords and decachords, i. e., ranges of nine and ten notes. […] The sixth tone forms an enneachord (C-d) and does not contain a diapente under its proper ending, but rather (again) a semitritone."

"He thinks of the creation as a grand symphony (see also figure 13), a notion we shall find diagrammed in figures 79-83; and here he explicates the universal harmony as ten "enneachords" — that is, a chord of nine notes."

"For example, under God in the mundus archetypus, we have nine orders of angels; under coelum empireum, we have the sphere of fixed stars and the seven planetary spheres (each indicated by a symbol and by the note it plays in the music of the spheres), with earth making up the ninth item in the enneachord and "playing the lowest note among the elements" (terra cum elementis proslambanomenos);"