This fragment comes from the preface to one of his works which some claim was entitled On Mathematics while others claim that it was entitled On Harmonics. Certainly, coming after this quote, there is a discussion of pitch, frequency and a theory of sound.
Kapi na ito ay mula sa paunang salita sa isa sa kanyang mga gawa na kung saan ang ilang mga claim ay may karapatan Sa Matematika habang ang iba claim na ito ay may karapatan Sa harmonika. Totoong, darating na matapos na ito quote, may discussion ng aspalto, at dalas ng pagpapakita ng teorya ng tunog.