Treatise on Universal Harmony

shows how one must compose Chromatic and Enharmonic songs; determines the number of the Modes; gives examples of each Genre and of each Mode, shows how many species of Diatonic and Enharmonic there can be, and how one can use them.

The Ninth treats of all sorts of Musical Instruments; explains their material, their construction, their temperaments, their tunings, their tablatures; teaches how to make perfect Instruments for the three genres of Music, and for their species, without there being any need for any temperament; how one must make Spinet harpsichords that hold their sound as long as Organs; Organs that pronounce syllables, words, and all sorts of discourse as well as men do, and heads that speak, like that which is attributed to Albert the Great.

The Tenth explains the Rhythmics and the Metrics, that is to say, the movements which one must use if one wants Music to produce good effects; teaches what Physicians can foresee, conjecture, or conclude by the rhythms and movements of the heart and of the pulse; and by which movements and exercises one can cure illnesses, or preserve health.

The Eleventh shows by which intervals one...