Book I — Chapter Index

I.	Proemium. That music is naturally joined to us, and either ennobles or corrupts our character.
II.	That there are three kinds of music; on the power of music.
III.	On sounds and the elements of music.
IIII.	On the species of inequality.
V.	Which species of inequality are assigned to consonances.
VI.	Why multiplicity and superparticularity are assigned to consonances.
VII.	Which proportions are suited to which musical consonances.
VIII.	What sound is, what an interval is, what a consonance is.
VIIII.	That not all judgment should be given to the senses, but rather more trust should be placed in reason; on the fallacy of the senses.
X.	How Pythagoras investigated the proportions of consonances.
XI.	The various ways in which Pythagoras weighed the proportions of consonances.
XII.	On the division of pitches and their explanation.
XIII.	That human nature has set a limit to the infinity of pitches.
XIIII.	What the proper mode of hearing is.
XV.	On the order of theorems, that is, of speculations.
XVI.	On the consonances of proportions, and on the tone and semitone.
XVII.	In which smallest numbers the semitone consists.
XVIII.	That the diatessaron is a tone distant from the diapente.
XVIIII.	That the diapason is joined from five tones and two semitones.
XX.	On the addition of strings and their names.
XXI.	On the genera of melody.
XXII.	On the order of strings and their names in the three genera.
XXIII.	What the proportions are between pitches in each of the individual genera.
XXIIII.	What synaphe is.
XXV.	What diazeuxis is.
XXVI.	By what names Albinus called the strings.
XXVII.	Which strings are compared to which heavenly bodies.
XXVIII.	What the nature of the consonances is.
XXVIIII.	Where consonances are to be found.
XXX.	How Plato says a consonance comes to be.
XXXI.	What Nicomachus thinks against Plato.
XXXII.	Which consonance rightly takes precedence over another.
XXXIII.	How what has been said should be understood.
XXXIIII.	What a musician is.