In the theory of Western music, a mode is a type of musical scale coupled with a set of characteristic melodic behaviors. Musical modes have been a part of western musical thought since the Middle Ages, and were inspired by the theory of ancient Greek music. The name mode derives from the Latin word modus, "measure, standard, manner, way, size, limit of quantity, method" (Powers 2001, Introduction; OED).
- 1 Mode as a general concept
- 2 Modes and scales
- 3 Greek modes
- 4 Western Church
- 5 Modern modes
- 6 Other types
- 7 Analogues in different musical traditions
- 8 See also
- 9 References
- 10 Further reading
- 11 External links
Mode as a general conceptEdit
Regarding the concept of mode as applied to pitch relationships generally, Harold S. Powers proposed mode as a general term but limited for melody types, which were based on the modal interpretation of ancient Greek octave species called tonos (τόνος) or harmonia (ἁρμονία), with "most of the area between ... being in the domain of mode" (Powers 2001, §I,3). This synthesis between tonus as a church tone and the older meaning associated with an octave species was done by medieval theorists for the Western monodic plainchant tradition (see Hucbald and Aurelian). Musicologists generally assume that Carolingian theorists imported monastic Octoechos propagated in the patriarchates of Jerusalem (Mar Saba) and Constantinople (Stoudios Monastery), which meant the eight echoi they used for the composition of hymns (e.g., Wellesz 1954, 41 ff.[page needed]), though direct adaptations of Byzantine chants in the surviving Gregorian repertoire are extremely rare.
Since the end of the 18th century, the term "mode" has also applied to pitch structures in non-European musical cultures, sometimes with doubtful compatibility (Powers 2001, §V,1). The concept is also heavily used with regard to Western polyphony before the onset of the common practice period, as for example "modale Mehrstimmigkeit" by Carl Dahlhaus (Dahlhaus 1968, 174 et passim) or "Tonarten" of the 16th and 17th centuries found by Bernhard Meier (Meier 1974; Meier 1992).
The word encompasses several additional meanings, however. Authors from the 9th century until the early 18th century (e.g., Guido of Arezzo) sometimes employed the Latin modus for interval. In the theory of late-medieval mensural polyphony (e.g., Franco of Cologne), modus is a rhythmic relationship between long and short values or a pattern made from them (Powers 2001, Introduction); in mensural music most often theorists applied it to division of longa into 3 or 2 breves.
Modes and scalesEdit
The concept of "mode" in Western music theory has three successive stages: in Gregorian chant theory, in Renaissance polyphonic theory, and in tonal harmonic music of the common practice period. In all three contexts, "mode" incorporates the idea of the diatonic scale, but differs from it by also involving an element of melody type. This concerns particular repertories of short musical figures or groups of tones within a certain scale so that, depending on the point of view, mode takes on the meaning of either a "particularized scale" or a "generalized tune". Modern musicological practice has extended the concept of mode to earlier musical systems, such as those of Ancient Greek music, Jewish cantillation, and the Byzantine system of octoechos, as well as to other non-Western types of music (Powers 2001, §I, 3; Winnington-Ingram 1936, 2–3).
By the early 19th century, the word "mode" had taken on an additional meaning, in reference to the difference between major and minor keys, specified as "major mode" and "minor mode". At the same time, composers were beginning to conceive of "modality" as something outside of the major/minor system that could be used to evoke religious feelings or to suggest folk-music idioms (Porter 2001).
Early Greek treatises describe three interrelated concepts that are related to the later, medieval idea of "mode": (1) scales (or "systems"), (2) tonos—pl. tonoi—(the more usual term used in medieval theory for what later came to be called "mode"), and (3) harmonia (harmony)—pl. harmoniai—this third term subsuming the corresponding tonoi but not necessarily the converse (Mathiesen 2001a, 6(iii)(e)).
- Mixolydian: hypate hypaton–paramese (b–b′)
- Lydian: parhypate hypaton–trite diezeugmenon (c′–c″)
- Phrygian: lichanos hypaton–paranete diezeugmenon (d′–d″)
- Dorian: hypate meson–nete diezeugmenon (e′–e″)
- Hypolydian: parhypate meson–trite hyperbolaion (f′–f″)
- Hypophrygian: lichanos meson–paranete hyperbolaion (g′–g″)
- Common, Locrian, or Hypodorian: mese–nete hyperbolaion or proslambnomenos–mese (a′–a″ or a–a′)
These names are derived from an Ancient Greek subgroup (Dorians), a small region in central Greece (Locris), and certain neighboring peoples (non-Greek but related to them) from Asia Minor (Lydia, Phrygia). The association of these ethnic names with the octave species appears to precede Aristoxenus, who criticized their application to the tonoi by the earlier theorists whom he called the "Harmonicists" (Mathiesen 2001a, 6(iii)(d)).[failed verification]
Depending on the positioning (spacing) of the interposed tones in the tetrachords, three genera of the seven octave species can be recognized. The diatonic genus (composed of tones and semitones), the chromatic genus (semitones and a minor third), and the enharmonic genus (with a major third and two quarter tones or dieses) (Cleonides 1965, 35–36). The framing interval of the perfect fourth is fixed, while the two internal pitches are movable. Within the basic forms, the intervals of the chromatic and diatonic genera were varied further by three and two "shades" (chroai), respectively (Cleonides 1965, 39–40; Mathiesen 2001a, 6(iii)(c)).
In contrast to the medieval modal system, these scales and their related tonoi and harmoniai appear to have had no hierarchical relationships amongst the notes that could establish contrasting points of tension and rest, although the mese ("middle note") may have had some sort of gravitational function (Palisca 2006, 77).
The term tonos (pl. tonoi) was used in four senses: "as note, interval, region of the voice, and pitch. We use it of the region of the voice whenever we speak of Dorian, or Phrygian, or Lydian, or any of the other tones" (Cleonides 1965, 44). Cleonides attributes thirteen tonoi to Aristoxenus, which represent a progressive transposition of the entire system (or scale) by semitone over the range of an octave between the Hypodorian and the Hypermixolydian (Mathiesen 2001a, 6(iii)(e)). Aristoxenus's transpositional tonoi, according to Cleonides (1965, 44), were named analogously to the octave species, supplemented with new terms to raise the number of degrees from seven to thirteen. However, according to the interpretation of at least three modern authorities, in these transpositional tonoi the Hypodorian is the lowest, and the Mixolydian next-to-highest—the reverse of the case of the octave species (Mathiesen 2001a, 6(iii)(e); Solomon 1984, 244–45; West 1992,[page needed]), with nominal base pitches as follows (descending order):
- F: Hypermixolydian (or Hyperphrygian)
- E: High Mixolydian or Hyperiastian
- E♭: Low Mixolydian or Hyperdorian
- D: Lydian
- C♯: Low Lydian or Aeolian
- C: Phrygian
- B: Low Phrygian or Iastian
- B♭: Dorian
- A: Hypolydian
- G♯: Low Hypolydian or Hypoaelion
- G: Hypophrygian
- F♯: Low Hypophrygian or Hypoiastian
- F: Hypodorian
Ptolemy, in his Harmonics, ii.3–11, construed the tonoi differently, presenting all seven octave species within a fixed octave, through chromatic inflection of the scale degrees (comparable to the modern conception of building all seven modal scales on a single tonic). In Ptolemy's system, therefore there are only seven tonoi (Mathiesen 2001a, 6(iii)(e); Mathiesen 2001c). Pythagoras also construed the intervals arithmetically (if somewhat more rigorously, initially allowing for 1:1 = Unison, 2:1 = Octave, 3:2 = Fifth, 4:3 = Fourth and 5:4 = Major Third within the octave). In their diatonic genus, these tonoi and corresponding harmoniai correspond with the intervals of the familiar modern major and minor scales. See Pythagorean tuning and Pythagorean interval.
In music theory the Greek word harmonia can signify the enharmonic genus of tetrachord, the seven octave species, or a style of music associated with one of the ethnic types or the tonoi named by them (Mathiesen 2001b).
Particularly in the earliest surviving writings, harmonia is regarded not as a scale, but as the epitome of the stylised singing of a particular district or people or occupation (Winnington-Ingram 1936, 3). When the late-6th-century poet Lasus of Hermione referred to the Aeolian harmonia, for example, he was more likely thinking of a melodic style characteristic of Greeks speaking the Aeolic dialect than of a scale pattern (Anderson and Mathiesen 2001). By the late 5th century BC, these regional types are being described in terms of differences in what is called harmonia—a word with several senses, but here referring to the pattern of intervals between the notes sounded by the strings of a lyra or a kithara.
However, there is no reason to suppose that, at this time, these tuning patterns stood in any straightforward and organised relations to one another. It was only around the year 400 that attempts were made by a group of theorists known as the harmonicists to bring these harmoniai into a single system and to express them as orderly transformations of a single structure. Eratocles was the most prominent of the harmonicists, though his ideas are known only at second hand, through Aristoxenus, from whom we learn they represented the harmoniai as cyclic reorderings of a given series of intervals within the octave, producing seven octave species. We also learn that Eratocles confined his descriptions to the enharmonic genus (Barker & 1984–89, 2:14–15).
In the Republic, Plato uses the term inclusively to encompass a particular type of scale, range and register, characteristic rhythmic pattern, textual subject, etc. (Mathiesen 2001a, 6(iii)(e)). He held that playing music in a particular harmonia would incline one towards specific behaviors associated with it, and suggested that soldiers should listen to music in Dorian or Phrygian harmoniai to help make them stronger but avoid music in Lydian, Mixolydian or Ionian harmoniai, for fear of being softened. Plato believed that a change in the musical modes of the state would cause a wide-scale social revolution (Plato, Rep. III.10–III.12 = 398C–403C)
The philosophical writings of Plato and Aristotle (c. 350 BC) include sections that describe the effect of different harmoniai on mood and character formation. For example, Aristotle in the Politics (Aristotle 1895, viii:1340a:40–1340b:5):
But melodies themselves do contain imitations of character. This is perfectly clear, for the harmoniai have quite distinct natures from one another, so that those who hear them are differently affected and do not respond in the same way to each. To some, such as the one called Mixolydian, they respond with more grief and anxiety, to others, such as the relaxed harmoniai, with more mellowness of mind, and to one another with a special degree of moderation and firmness, Dorian being apparently the only one of the harmoniai to have this effect, while Phrygian creates ecstatic excitement. These points have been well expressed by those who have thought deeply about this kind of education; for they cull the evidence for what they say from the facts themselves. (Barker & 1984–89, 1:175–76)
Aristotle continues by describing the effects of rhythm, and concludes about the combined effect of rhythm and harmonia (viii:1340b:10–13):
From all this it is clear that music is capable of creating a particular quality of character [ἦθος] in the soul, and if it can do that, it is plain that it should be made use of, and that the young should be educated in it. (Barker & 1984–89, 1:176)
Some treatises also describe "melic" composition (μελοποιΐα), "the employment of the materials subject to harmonic practice with due regard to the requirements of each of the subjects under consideration" (Cleonides 1965, 35)—which, together with the scales, tonoi, and harmoniai resemble elements found in medieval modal theory (Mathiesen 2001a, 6(iii)). According to Aristides Quintilianus (On Music, i.12), melic composition is subdivided into three classes: dithyrambic, nomic, and tragic. These parallel his three classes of rhythmic composition: systaltic, diastaltic and hesychastic. Each of these broad classes of melic composition may contain various subclasses, such as erotic, comic and panegyric, and any composition might be elevating (diastaltic), depressing (systaltic), or soothing (hesychastic) (Mathiesen 2001a, 4).
According to Mathiesen, music as a performing art was called melos, which in its perfect form (μέλος τέλειον) comprised not only the melody and the text (including its elements of rhythm and diction) but also stylized dance movement. Melic and rhythmic composition (respectively, μελοποιΐα and ῥυθμοποιΐα) were the processes of selecting and applying the various components of melos and rhythm to create a complete work. Aristides Quintilianus:
And we might fairly speak of perfect melos, for it is necessary that melody, rhythm and diction be considered so that the perfection of the song may be produced: in the case of melody, simply a certain sound; in the case of rhythm, a motion of sound; and in the case of diction, the meter. The things contingent to perfect melos are motion-both of sound and body-and also chronoi and the rhythms based on these. (Mathiesen 1983, 75).
Tonaries, lists of chant titles grouped by mode, appear in western sources around the turn of the 9th century. The influence of developments in Byzantium, from Jerusalem and Damascus, for instance the works of Saints John of Damascus (d. 749) and Cosmas of Maiouma (Nikodēmos ’Agioreitēs 1836, 1:32–33; Barton 2009), are still not fully understood. The eight-fold division of the Latin modal system, in a four-by-two matrix, was certainly of Eastern provenance, originating probably in Syria or even in Jerusalem, and was transmitted from Byzantine sources to Carolingian practice and theory during the 8th century. However, the earlier Greek model for the Carolingian system was probably ordered like the later Byzantine oktōēchos, that is, with the four principal (authentic) modes first, then the four plagals, whereas the Latin modes were always grouped the other way, with the authentics and plagals paired (Powers 2001, §II.1(ii)).
The 6th-century scholar Boethius had translated Greek music theory treatises by Nicomachus and Ptolemy into Latin (Powers 2001). Later authors created confusion by applying mode as described by Boethius to explain plainchant modes, which were a wholly different system (Palisca 1984, 222). In his De institutione musica, book 4 chapter 15, Boethius, like his Hellenistic sources, twice used the term harmonia to describe what would likely correspond to the later notion of "mode", but also used the word "modus"—probably translating the Greek word τρόπος (tropos), which he also rendered as Latin tropus—in connection with the system of transpositions required to produce seven diatonic octave species (Bower 1984, 253, 260–61), so the term was simply a means of describing transposition and had nothing to do with the church modes (Powers 2001, §II.1(i)).
Later, 9th-century theorists applied Boethius’s terms tropus and modus (along with "tonus") to the system of church modes. The treatise De Musica (or De harmonica institutione) of Hucbald synthesized the three previously disparate strands of modal theory: chant theory, the Byzantine oktōēchos and Boethius's account of Hellenistic theory (Powers 2001, §II.2). The late-9th- and early 10th-century compilation known as the Alia musica imposed the seven octave transpositions, known as tropus and described by Boethius, onto the eight church modes (Powers 2001, §II.2(ii)), but its compilator also mentions the Greek (Byzantine) echoi translated by the Latin term sonus. Thus, the names of the modes became associated with the eight church tones and their modal formulas—but this medieval interpretation doesn't fit the concept of the Ancient Greek harmonics treatises. The modern understanding of mode does not reflect that it is made of different concepts that don't all fit.
According to Carolingian theorists the eight church modes, or Gregorian modes, can be divided into four pairs, where each pair shares the "final" note and the four notes above the final, but they have different intervals concerning the species of the fifth. If the octave is completed by adding three notes above the fifth, the mode is termed authentic, but if the octave is completed by adding three notes below, it is called plagal (from Greek πλάγιος, "oblique, sideways"). Otherwise explained: if the melody moves mostly above the final, with an occasional cadence to the sub-final, the mode is authentic. Plagal modes shift range and also explore the fourth below the final as well as the fifth above. In both cases, the strict ambitus of the mode is one octave. A melody that remains confined to the mode's ambitus is called "perfect"; if it falls short of it, "imperfect"; if it exceeds it, "superfluous"; and a melody that combines the ambituses of both the plagal and authentic is said to be in a "mixed mode" (Rockstro 1880, 343).
Although the earlier (Greek) model for the Carolingian system was probably ordered like the Byzantine oktōēchos, with the four authentic modes first, followed by the four plagals, the earliest extant sources for the Latin system are organized in four pairs of authentic and plagal modes sharing the same final: protus authentic/plagal, deuterus authentic/plagal, tritus authentic/plagal, and tetrardus authentic/plagal (Powers 2001, §II, 1 (ii)).
Each mode has, in addition to its final, a "reciting tone", sometimes called the "dominant" (Apel 1969, 166; Smith 1989, 14). It is also sometimes called the "tenor", from Latin tenere "to hold", meaning the tone around which the melody principally centres (Fallows 2001). The reciting tones of all authentic modes began a fifth above the final, with those of the plagal modes a third above. However, the reciting tones of modes 3, 4, and 8 rose one step during the 10th and 11th centuries with 3 and 8 moving from B to C (half step) and that of 4 moving from G to A (whole step) (Hoppin 1978, 67).
After the reciting tone, every mode is distinguished by scale degrees called "mediant" and "participant". The mediant is named from its position between the final and reciting tone. In the authentic modes it is the third of the scale, unless that note should happen to be B, in which case C substitutes for it. In the plagal modes, its position is somewhat irregular. The participant is an auxiliary note, generally adjacent to the mediant in authentic modes and, in the plagal forms, coincident with the reciting tone of the corresponding authentic mode (some modes have a second participant) (Rockstro 1880, 342).
Only one accidental is used commonly in Gregorian chant—B may be lowered by a half-step to B♭. This usually (but not always) occurs in modes V and VI, as well as in the upper tetrachord of IV, and is optional in other modes except III, VII and VIII (Powers 2001, §II.3.i(b), Ex. 5).
|Mode||I (Dorian)||II (Hypodorian)||III (Phrygian)||IV (Hypophrygian)||V (Lydian)||VI (Hypolydian)||VII (Mixolydian)||VIII (Hypomixolydian)|
|Final||D (re)||D (re)||E (mi)||E (mi)||F (fa)||F (fa)||G (sol)||G (sol)|
|Dominant||A (la)||F (fa)||B (si) or C (do)||G (sol) or A (la)||C (do)||A (la)||D (re)||B (si) or C (do)|
In 1547, the Swiss theorist Henricus Glareanus published the Dodecachordon, in which he solidified the concept of the church modes, and added four additional modes: the Aeolian (mode 9), Hypoaeolian (mode 10), Ionian (mode 11), and Hypoionian (mode 12). A little later in the century, the Italian Gioseffo Zarlino at first adopted Glarean's system in 1558, but later (1571 and 1573) revised the numbering and naming conventions in a manner he deemed more logical, resulting in the widespread promulgation of two conflicting systems.
Zarlino's system reassigned the six pairs of authentic–plagal mode numbers to finals in the order of the natural hexachord, C–D–E–F–G–A, and transferred the Greek names as well, so that modes 1 through 8 now became C-authentic to F-plagal, and were now called by the names Dorian to Hypomixolydian. The pair of G modes were numbered 9 and 10 and were named Ionian and Hypoionian, while the pair of A modes retained both the numbers and names (11, Aeolian, and 12 Hypoaeolian) of Glarean's system. While Zarlino's system became popular in France, Italian composers preferred Glarean's scheme because it retained the traditional eight modes, while expanding them. Luzzasco Luzzaschi was an exception in Italy, in that he used Zarlino’s new system (Powers 2001, §III.4(ii)(a), (iii) & §III.5(i & ii)).
In the late-18th and 19th centuries, some chant reformers (notably the editors of the Mechlin, Pustet-Ratisbon (Regensburg), and Rheims-Cambrai Office-Books, collectively referred to as the Cecilian Movement) renumbered the modes once again, this time retaining the original eight mode numbers and Glareanus's modes 9 and 10, but assigning numbers 11 and 12 to the modes on the final B, which they named Locrian and Hypolocrian (even while rejecting their use in chant). The Ionian and Hypoionian modes (on C) become in this system modes 13 and 14 (Rockstro 1880, 342).
Given the confusion between ancient, medieval, and modern terminology, "today it is more consistent and practical to use the traditional designation of the modes with numbers one to eight" (Curtis 1997, 256), using Roman numeral (I–VIII), rather than using the pseudo-Greek naming system. Medieval terms, first used in Carolingian treatises, later in Aquitanian tonaries, are still used by scholars today: the Greek ordinals ("first", "second", etc.) transliterated into the Latin alphabet protus (πρῶτος), deuterus (δεύτερος), tritus (τρίτος), and tetrardus (τέταρτος). In practice they can be specified as authentic or as plagal like "protus authentus / plagalis".
A mode indicated a primary pitch (a final); the organization of pitches in relation to the final; suggested range; melodic formulas associated with different modes; location and importance of cadences; and affect (i.e., emotional effect/character). Liane Curtis writes that "Modes should not be equated with scales: principles of melodic organization, placement of cadences, and emotional affect are essential parts of modal content" in Medieval and Renaissance music (Curtis 1997, 255. Carl Dahlhaus (1990, 192) lists "three factors that form the respective starting points for the modal theories of Aurelian of Réôme, Hermannus Contractus, and Guido of Arezzo:
- the relation of modal formulas to the comprehensive system of tonal relationships embodied in the diatonic scale;
- the partitioning of the octave into a modal framework; and
- the function of the modal final as a relational center.
The oldest medieval treatise regarding modes is Musica disciplina by Aurelian of Réôme (dating from around 850) while Hermannus Contractus was the first to define modes as partitionings of the octave (Dahlhaus 1990, 192–91). However, the earliest Western source using the system of eight modes is the Tonary of St Riquier, dated between about 795 and 800 (Powers 2001, §II 1(ii)).
Various interpretations of the "character" imparted by the different modes have been suggested. Three such interpretations, from Guido of Arezzo (995–1050), Adam of Fulda (1445–1505), and Juan de Espinosa Medrano (1632–1688), follow:
Name Mode D'Arezzo Fulda Espinosa Example chant Dorian I serious any feeling happy, taming the passions Veni sancte spiritus Hypodorian II sad sad serious and tearful Iesu dulcis amor meus Phrygian III mystic vehement inciting anger Kyrie, fons bonitatis Hypophrygian IV harmonious tender inciting delights, tempering fierceness Conditor alme siderum Lydian V happy happy happy Salve Regina Hypolydian VI devout pious tearful and pious Ubi caritas Mixolydian VII angelical of youth uniting pleasure and sadness Introibo Hypomixolydian VIII perfect of knowledge very happy Ad cenam agni providi
Although the names of the modern modes are Greek and some have names used in ancient Greek theory for some of the harmoniai, the names of the modern modes are conventional and do not indicate a link between them and ancient Greek theory, and they do not present the sequences of intervals found even in the diatonic genus of the Greek octave species sharing the same name.
Modern Western modes use the same set of notes as the major scale, in the same order, but starting from one of its seven degrees in turn as a tonic, and so present a different sequence of whole and half steps. The interval sequence of the major scale being W–W–H–W–W–W–H, where "H" means a semitone (half step) and "W" means a whole tone (whole step), it is thus possible to generate the following scales:
Mode Tonic relative
to major scale
Interval sequence Example Ionian I W–W–H–W–W–W–H C–D–E–F–G–A–B–C Dorian II W–H–W–W–W–H–W D–E–F–G–A–B–C–D Phrygian III H–W–W–W–H–W–W E–F–G–A–B–C–D–E Lydian IV W–W–W–H–W–W–H F–G–A–B–C–D–E–F Mixolydian V W–W–H–W–W–H–W G–A–B–C–D–E–F–G Aeolian VI W–H–W–W–H–W–W A–B–C–D–E–F–G–A Locrian VII H–W–W–H–W–W–W B–C–D–E–F–G–A–B
For the sake of simplicity, the examples shown above are formed by natural notes (also called "white notes", as they can be played using the white keys of a piano keyboard). However, any transposition of each of these scales is a valid example of the corresponding mode. In other words, transposition preserves mode.
Each mode has characteristic intervals and chords that give it its distinctive sound. The following is an analysis of each of the seven modern modes. The examples are provided in a key signature with no sharps or flats (scales composed of natural notes).
- Tonic triad: C major
- Tonic seventh chord: CM7
- Dominant triad: G (in modern tonal thinking, the fifth or dominant scale degree, which in this case is G, is the next-most important chord root after the tonic)
- Seventh chord on the dominant: G7 (a dominant seventh chord, so-called because of its position in this—and only this—modal scale)
The Dorian mode is the second mode. The example composed of natural notes begins on D:
The Dorian mode is very similar to the modern natural minor scale (see Aeolian mode below). The only difference with respect to the natural minor scale is in the sixth scale degree, which is a major sixth (M6) above the tonic, rather than a minor sixth (m6).
- Tonic triad: Dm
- Tonic seventh chord: Dm7
- Dominant triad: Am
- Seventh chord on the dominant: Am7 (a minor seventh chord)
The Phrygian mode is the third mode. The example composed of natural notes starts on E:
The Phrygian mode is very similar to the modern natural minor scale (see Aeolian mode below). The only difference with respect to the natural minor scale is in the second scale degree, which is a minor second (m2) above the tonic, rather than a major second (M2).
- Tonic triad: Em
- Tonic seventh chord: Em7
- Dominant triad: Bdim
- Seventh chord on the dominant: Bø7 (a half-diminished seventh chord)
The Lydian mode is the fourth mode. The example composed of natural notes starts on F:
- Tonic triad: F
- Tonic seventh chord: FM7
- Dominant triad: C
- Seventh chord on the dominant: CM7 (a major seventh chord)
The Mixolydian mode is the fifth mode. The example composed of natural notes begins on G:
The single tone that differentiates this scale from the major scale (Ionian mode), is its seventh degree, which is a minor seventh (m7) above the tonic (G), rather than a major seventh (M7). Therefore, the seventh scale degree becomes a subtonic to the tonic because it is now a whole tone lower than the tonic, in contrast to the seventh degree in the major scale, which is a semitone tone lower than the tonic (leading-tone).
- Tonic triad: G
- Tonic seventh chord: G7 (the dominant seventh chord in this mode is the seventh chord built on the tonic degree)
- Dominant triad: Dm
- Seventh chord on the dominant: Dm7 (a minor seventh chord)
- Tonic triad: Am
- Tonic seventh chord: Am7
- Dominant triad: Em
- Seventh chord on the dominant: Em7 (a minor seventh chord)
The Locrian mode is the seventh mode. The example composed of natural notes begins on B:
The distinctive scale degree here is the diminished fifth (d5). This makes the tonic triad diminished, so this mode is the only one in which the chords built on the tonic and dominant scale degrees have their roots separated by a diminished, rather than perfect, fifth. Similarly the tonic seventh chord is half-diminished.
- Tonic triad: Bdim or B°
- Tonic seventh chord: Bm7♭5 or Bø7
- Dominant triad: F
- Seventh chord on the dominant: FM7 (a major seventh chord)
The modes can be arranged in the following sequence, which follows the circle of fifths. In this sequence, each mode has one more lowered interval relative to the tonic than the mode preceding it. Thus, taking Lydian as reference, Ionian (major) has a lowered fourth; Mixolydian, a lowered fourth and seventh; Dorian, a lowered fourth, seventh, and third; Aeolian (Natural Minor), a lowered fourth, seventh, third, and sixth; Phrygian, a lowered fourth, seventh, third, sixth, and second; and Locrian, a lowered fourth, seventh, third, sixth, second, and fifth. Put another way, the augmented fourth of the Lydian scale has been reduced to a perfect fourth in Ionian, the major seventh in Ionian, to a minor seventh in Mixolydian, etc.
Intervals with respect to the tonic prime second third fourth fifth sixth seventh octave Lydian F perfect major major augmented perfect major major perfect Ionian C perfect Mixolydian G minor Dorian D minor Aeolian A minor Phrygian E minor Locrian B diminished
The first three modes are sometimes called major (Carroll 2001, 134; Marx 1852, 336, 338, 342, 346; Serna 2013, 35), the next three minor (Carroll 2001, 153; Marx 1852, 336; Serna 2013, 35), and the last one diminished (Locrian), according to the quality of their tonic triads. The Locrian mode is traditionally considered theoretical rather than practical because the triad built on the first scale degree is diminished. Because diminished triads are not consonant they do not lend themselves to cadential endings and cannot be tonicized according to traditional practice.
- The Ionian mode corresponds to the major scale. Scales in the Lydian mode are major scales with an augmented fourth. The Mixolydian mode corresponds to the major scale with a minor seventh.
- The Aeolian mode is identical to the natural minor scale. The Dorian mode corresponds to the natural minor scale with a major sixth. The Phrygian mode corresponds to the natural minor scale with a minor second.
- The Locrian is neither a major nor a minor mode because, although its third scale degree is minor, the fifth degree is diminished instead of perfect. For this reason it is sometimes called a "diminished" scale, though in jazz theory this term is also applied to the octatonic scale. This interval is enharmonically equivalent to the augmented fourth found between scale-degrees 1 and 4 in the Lydian mode and is also referred to as the tritone.
Use and conception of modes or modality today is different from that in early music. As Jim Samson explains, "Clearly any comparison of medieval and modern modality would recognize that the latter takes place against a background of some three centuries of harmonic tonality, permitting, and in the 19th century requiring, a dialogue between modal and diatonic procedure" (Samson 1977, 148). Indeed, when 19th-century composers revived the modes, they rendered them more strictly than Renaissance composers had, to make their qualities distinct from the prevailing major-minor system. Renaissance composers routinely sharped leading tones at cadences and lowered the fourth in the Lydian mode (Carver 2005, 74n4).
The Ionian, or Iastian (Anon. 1896; Chafe 1992, 23, 41, 43, 48; Glareanus 1965, 153; Hiley 2002, §2(b); Powers 2001, §4.ii(a); Pratt 1907, 67; Taylor 1876, 419; Wiering 1995, 25) mode is another name for the major scale used in much Western music. The Aeolian forms the base of the most common Western minor scale; in modern practice the Aeolian mode is differentiated from the minor by using only the seven notes of the Aeolian scale. By contrast, minor mode compositions of the common practice period frequently raise the seventh scale degree by a semitone to strengthen the cadences, and in conjunction also raise the sixth scale degree by a semitone to avoid the awkward interval of an augmented second. This is particularly true of vocal music (Jones 1974, 33).
Traditional folk music provides countless examples of modal melodies. For example, Irish traditional music makes extensive usage not only of the major mode, but also the Mixolydian, Dorian, and Aeolian modes (Cooper 1995, 9–20). Much Flamenco music is in the Phrygian mode, though frequently with the third and seventh degrees raised by a semitone (Gómez, Díaz-Báñez, Gómez, and Mora 2014, 121, 123).
Zoltán Kodály, Gustav Holst, Manuel de Falla use modal elements as modifications of a diatonic background, while in the music of Debussy and Béla Bartók modality replaces diatonic tonality (Samson 1977,[page needed]).
While the term "mode" is still most commonly understood to refer to Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, or Locrian scales, in modern music theory the word is sometimes applied to scales other than the diatonic. This is seen, for example, in melodic minor scale harmony, which is based on the seven rotations of the ascending melodic minor scale, yielding some interesting scales as shown below. The "chord" row lists tetrads that can be built from the pitches in the given mode (Levine 1995, 55–77) (in jazz notation, the symbol Δ is for a major seventh).
|Name||Ascending melodic minor||Phrygian ♯6 or
|Lydian augmented||Lydian dominant||Mixolydian ♭6||Half-diminished||Altered dominant|
|Notes||1 2 ♭3 4 5 6 7||1 ♭2 ♭3 4 5 6 ♭7||1 2 3 ♯4 ♯5 6 7||1 2 3 ♯4 5 6 ♭7||1 2 3 4 5 ♭6 ♭7||1 2 ♭3 4 ♭5 ♭6 ♭7||1 ♭2 ♭3 ♭4 ♭5 ♭6 ♭7|
|Name||Harmonic minor||Locrian ♯6||Ionian ♯5||Ukrainian Dorian||Phrygian Dominant||Lydian ♯2||Altered Diminished|
|Notes||1 2 ♭3 4 5 ♭6 7||1 ♭2 ♭3 4 ♭5 6 ♭7||1 2 3 4 ♯5 6 7||1 2 ♭3 ♯4 5 6 ♭7||1 ♭2 3 4 5 ♭6 ♭7||1 ♯2 3 ♯4 5 6 7||1 ♭2 ♭3 ♭4 ♭5 ♭6 7|
|Chord||C–Δ||Dø||E♭Δ♯5||F–7||G7♭9||A♭Δ or A♭–Δ||Bo7|
|Name||Double harmonic||Lydian ♯2 ♯6||Phrygian 7 ♭4||Hungarian minor||Locrian ♮6 ♮3 or
Mixolydian ♭5 ♭2
|Ionian ♯5 ♯2||Locrian 3 7|
|Notes||1 ♭2 3 4 5 ♭6 7||1 ♯2 3 ♯4 5 ♯6 7||1 ♭2 ♭3 ♭4 5 ♭6 7||1 2 ♭3 ♯4 5 ♭6 7||1 ♭2 3 4 ♭5 6 ♭7||1 ♯2 3 4 ♯5 6 7||1 ♭2 3 4 ♭5 ♭6 7|
The number of possible modes for any intervallic set is dictated by the pattern of intervals in the scale. For scales built of a pattern of intervals that only repeats at the octave (like the diatonic set), the number of modes is equal to the number of notes in the scale. Scales with a recurring interval pattern smaller than an octave, however, have only as many modes as notes within that subdivision: e.g., the diminished scale, which is built of alternating whole and half steps, has only two distinct modes, since all odd-numbered modes are equivalent to the first (starting with a whole step) and all even-numbered modes are equivalent to the second (starting with a half step).
The chromatic and whole-tone scales, each containing only steps of uniform size, have only a single mode each, as any rotation of the sequence results in the same sequence. Another general definition excludes these equal-division scales, and defines modal scales as subsets of them: "If we leave out certain steps of a[n equal-step] scale we get a modal construction" (Karlheinz Stockhausen, in Cott 1973, 101). In "Messiaen's narrow sense, a mode is any scale made up from the 'chromatic total,' the twelve tones of the tempered system" (Vieru 1985, 63).
Analogues in different musical traditionsEdit
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- All modes mapped out in all positions for 6, 7 and 8 string guitar
- The use of guitar modes in jazz music
- Neume Notation Project
- Division of the Tetrachord, John Chalmers
- Greek and Liturgical Modes
- The Ancient Musical Modes: What Were They?, Eric Friedlander MD
- An interactive demonstration of many scales and modes
- The Music of Anciuent Greeks, an approach to the original singing of the Homeric epics and early Greek epic and lyrical poetry by Ioannidis Nikolaos
- relatively concise overview of ancient Greek musical culture and philosophy https://web.archive.org/web/20111009115813/http://arts.jrank.org/pages/258/ancient-Greek-music.html
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