Namque cum flectitur, inmutatione vox statuit se in alicuius sonitus finitionem, deinde in alterius, et id ultro citro crebre faciendo constans apparet sensibus, uti in cantionibus cum flectentes vocem varietatem facimus.
For when the voice is modulated, the voice in changing is directed first to one determinate sound and then to another. Doing this often backwards and forwards it appears consistent to the sense of hearing, as when in singing we modulate the voice in various ways.
final_alignments\Vitruvius_Architecture_Book_5.json