Uti enim organa in aeneis lamminis aut corneis echeis ad cordarum sonitum claritatem perficiuntur, sic theatrorum per harmonicen ad augendam vocem ratiocinationes ab antiquis sunt constitutae.
For just as organs which have bronze plates or horn sounding boards are brought to the clear sound of string instruments, so by the arrangement of theatres in accordance with the science of harmony, the ancients increased the power of the voice.
final_alignments\Vitruvius_Architecture_Book_5.json