The Twelve-Stringed Lyre

What the monochord is, according to the author Guido [of Arezzo]. 46
The form of the monochord among those living near the Rhine. 48 & 49
The division of the monochord, which is doubted to be ancient. 49 & 50
The division of the monochord at length. 52
The form of the monochord consists within a double octave disdiapason. 51
Multiple proportion. 227 & 228
Multiple superparticular proportion. 228
What multiple superpartient proportion is. 228
Definition and division of Music. 1
Practical Music. 1
The elements of practical Music. 1
Theoretical Music is threefold. 1
A general model for musicians. 4
It is the mark of the greatest musician to judge the Modes learnedly. 251
What the nine Muses signify. 98
What mutation the transition between hexachords is in music. 12
Examples of the mutation of voices. 13
Harsh mutations to be avoided. 14

N

The four strings of ancient Music. 9
What Nete, Paranete, and Trite original: "Νέτη"; high-pitched strings in the ancient Greek system are. 10
What a neuma a melodic gesture or melisma is, and how it is inflected. 131 & 43
Nicolaus Craen, composer Symphonetes. 320
The opinion of Nicomachus [of Gerasa] on how consonance is formed. 24
The antiphon Nos qui vivimus original: "Nos qui uiuimus"; We who live in the Aeolian Mode. 109
The figures of notes in plainchant according to Franchino [Gaffurio]. 9
Which and how many notes there are in mensural song. 196
The ligatures of notes are learned through eight rules. 197

O

Objections from Boethius, and several of his passages treated therein. 86 & 87
Obrecht—specifically, Jacob Obrecht a famous Franco-Flemish composer.
Ptolemy's eighth Mode is not our eighth [mode]. 70
An eight-voice song by Jean Mouton. 466
[Marpurg de] Orto, composer. 320
The hymn of Saints Ambrose and Augustine the Te Deum sung in the Hypophrygian Mode. 110
The same logic of octaves. 5

P

Pange lingua original: "Pange lingua"; Sing, my tongue in plainchant. 163
The harmony of the Lord's Passion. 34 & 145
The Pater noster original: "Pater noster"; Our Father in the Aeolian Mode. 105
The Patrem the Creed in plainchant. 106
A pause, and how many there are. 198
The pectis, a musical instrument an ancient Greek harp. 47
The mode called Peregrinus the "wandering" tone. 42
Perfection in music consists of the number three referring to triple meter. 200
Permutation of voices. 12 & 13
The harmony of a Phalaecian poem. 186
The Singer Phonascus and Composer Symphonetes are born. 174
Praise of the Singer. 174

The Phrygian Mode consists from E to e. 66
Why the Phrygian is called the third [mode]. 76
The nature of the Phrygian explained, and examples of it indicated. 123
An example of the Phrygian Mode in plainchant. 124
Examples of the Phrygian in mensural song. 312 and following.
The Phrygian phrase and system, not ending in its proper place. 450
Examples of the Phrygian and Hypomixolydian between D and d, yet with different phrasing. 163
The connection of the Phrygian and Hypophrygian. 142
An example of the connected Phrygian and Hypophrygian in plainchant. 142
An example of the same connected modes in mensural song. 376
What a phthongus a musical pitch or sound is. 23
Plato's opinion on the generation of consonance. 24
Plato's passage concerning the Muses. 99
A passage from Plato's Book 3 of the Republic treated. 127
How Plato rejected the Lydian. 127 & 128
How Plagal modes fall into Authentic ones. 120
Planxit autem David original: "Plaxit aut Dauid"; David lamented; a motet by Josquin explained in mensural song. 367
A passage of Pliny discussed. 97
Poliziano does not rightly rebuke Servius. 85
A passage of Poliziano from the Panepistemon. 88
The rejected opinion of Poliziano and Franchino [Gaffurio] regarding the Hyperphrygian. 87 & 132
A passage of Porphyrio discussed. 90
Michael Rubellus, the teacher of Glarean. 155
What prolation is in music. 201
What proportion is. 227
Five kinds of proportions. 228
The excessive multitude of musical proportions. 228
The Proslambanomene, the first string of all the Modes. 88
Why the Proslambanomene the lowest note in the Greek system is so called. 10
Pulchra es amica mea original: "Pulchra es amica mea"; Thou art beautiful, my friend in plainchant. 142
What a dot punctus is, and how many species it has. 199

Q

Quadruple proportion and a musical example of it. 231
Other examples of quadruple proportion. 232
An example of the fourth species of the fifth diapente in the disjunct [tetrachord]. 439
New names for the four voices. 239
A question concerning the excellence of the Singer and the Composer. 174
A complaint about the uncertainty of this art. 214
The five tetrachords. 9

R

The responsory Regnum mundi original: "Regnum mundi"; The kingdom of the world in plainchant. 117
The rejected opinion of musicians concerning the threefold quality of voices. 2
Human affairs compared to the sea. 177
Rottweil, a town in the Swiss wilderness original: "Rotuila in Eremo Heluetiorum"; Glarean's birthplace. 154