Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, offers a video orientation to Penn Library’s LJS 295, Kitāb-i Advār, written by Urmawī, ʻAbd al-Muʼmin ibn Yūsuf. This manuscript was written in Iran in A.H. 815 (1412) and it is a Persian translation of al-Urmawī’s treatise on the theory of music, including division of frets, ratio of intervals, consonance and dissonance, cycles, rhythmic and melodic modes, and the 5-string oud or lute.

You can see the full online facsimile of this work in Penn in Hand and you can download all of the images and metadata at OPenn.