In order to achieve an historically-informed reconstruction of the organ, most notably the windchest and conical pipes, reference was made to the coeval treatise De diversis artibus or Schedula diversarum artium by Theophilus. The lengths of the organ pipes, their arrangement on the windchest and the lineup of their mouths, all correspond to the illustration. It follows that the image should be regarded as one of the earliest documentary evidences of an organ with variable widths-scaling.
Some questions concerning the sound of the organ remain, most notably were the pairs of equal-length pipes tuned in unison or slightly mistuned, resulting in an undulating sound? Would this oscillation or beating effect be a plausible sound model for medieval organs? And could it be considered as a precursor of the Italian Renaissance organ stop, the ‘Voce Umana’?