Music Theory And Composition Codexery

Cadence

A phrase-ending progression creating resolution or suspension.

Cadence

Andy Li · CC0

In Western music theory, a cadence—from the Latin *cadentia*, meaning "a falling"—marks the end of a phrase where the melody or harmony gives a feeling of either full or partial resolution, a concept especially relevant from the 16th century onward. A harmonic cadence involves a progression of at least two chords that closes off a phrase, section, or entire piece, while a rhythmic cadence uses a distinctive rhythmic pattern to signal a phrase's end. Cadences can be described as "weak" or "strong" based on how final they sound. However, simply using specific chord or melodic progressions does not automatically create a cadence; there must be a genuine sense of closure, as occurs at a phrase's conclusion. Harmonic rhythm is key to pinpointing where a cadence happens. The term "cadence" can shift slightly in meaning depending on context—it might refer to the last few notes of a phrase, just the final chord, or general chord progressions suitable for ending phrases. Cadences strongly indicate the tonic, or central pitch, of a passage or piece. Musicologist Edward Lowinsky suggested that the cadence was the "cradle of tonality."

Cadences are commonly grouped into four main types based on harmonic progression: authentic (often split into perfect authentic and imperfect authentic), half, plagal, and deceptive. Phrases typically end on authentic or half cadences, while plagal and deceptive refer to motion that either avoids or follows a phrase-ending cadence. Each type can be described using Roman numeral chord notation.

An authentic cadence moves from a dominant-functioning chord (usually V) to the tonic chord (I). A seventh can be added to the dominant to form a dominant seventh chord (V7), and other dominant-functioning chords, like a leading-tone triad or seventh chord, can also substitute. The dominant chord may be preceded by a cadential 64 chord. As *The Harvard Concise Dictionary of Music and Musicians* notes, "This cadence is a microcosm of the tonal system, and is the most direct means of establishing a pitch as tonic. It is virtually obligatory as the final structural cadence of a tonal work." Authentic cadences are generally classified as perfect or imperfect. The term "perfect cadence" is sometimes used interchangeably with authentic cadence, but it can also have a more precise meaning depending on chord voicing.

In a perfect authentic cadence (PAC), both chords are in root position—meaning the roots of both chords are in the bass—and the tonic is the highest note in the final chord. This is widely considered the strongest type of cadence and often appears at structurally important moments. Music theorist William Caplin states that the perfect authentic cadence "achieves complete harmonic and melodic closure."

There are three types of imperfect authentic cadences (IAC). A root position IAC is similar to a perfect authentic cadence, but the highest voice is not the tonic. An inverted IAC is also similar, but one or both chords are inverted. A leading-tone IAC replaces the penultimate V chord with a chord based on the leading-tone (viio chord). In many recent theories (such as William Caplin's Theory of Formal Functions, Janet Schmalfeldt's "Becoming," and James Hepokoski and Warren Darcy's Sonata Theory), the latter two categories of IAC are considered non-cadential and are referred to as evaded cadences.

An evaded cadence (a subtype of the inverted IAC) moves from a dominant seventh third inversion chord (V42) to a first inversion tonic chord (I6). Because the seventh of the dominant chord must descend stepwise to the third of the tonic, the cadence resolves to the less stable first inversion chord. To achieve this, a root position V typically changes to a V42 just before resolution, thereby "evading" the root-position I chord that would normally follow a root-position V.

A half cadence (also called an imperfect cadence or semicadence) is any cadence that ends on V, regardless of what chord precedes it (such as II, ii, vi, IV, or I). Because it sounds incomplete or suspended, the half cadence is considered weak and calls for continuation. Several specific types exist.

A Phrygian half cadence is a half cadence using iv6–V in minor, named for the semitonal motion in the bass (from the sixth degree to the fifth), which resembles the half-step in the ii–I of the 15th-century Phrygian mode cadence. As a survival from modal Renaissance harmony, it gives an archaic sound, especially when preceded by v (v–iv6–V). A characteristic gesture in Baroque music, the Phrygian cadence often concluded a slow movement that was immediately followed ("attacca") by a faster one.

A Lydian cadence is similar to the Phrygian half cadence, also involving iv6–V in minor. The difference is that in the Lydian cadence, the entire iv6 chord is raised by a half step. In other words, the Phrygian half cadence starts with a chord built on scale degree 6, while the Lydian cadence is built on scale degree ♯4.

Burgundian cadences became popular in Burgundian music and feature parallel fourths between the upper voices.

The rare plagal half cadence involves a I–IV progression. Like an authentic cadence (V–I), the plagal half cadence uses an ascending fourth (or, by inversion, a descending fifth). It is a weak cadence, usually found at the end of an antecedent phrase, after which a consequent phrase begins.

subtypes
Perfect authentic, imperfect authentic, deceptive, Phrygian half, minor plagal

Lore & Background

In Western musical theory, a cadence marks the end of a musical phrase, where melody or harmony creates a sense of full or partial resolution, a concept particularly relevant from the 16th century onward. A harmonic cadence involves a progression of two or more chords concluding a phrase, section, or piece, while a rhythmic cadence uses a characteristic rhythmic pattern to signal a phrase’s end. Cadences are labeled weak or strong based on the impression of finality they convey. The sense of closure is essential; merely using specific chord progressions does not constitute a cadence without this feeling. Harmonic rhythm helps determine where a cadence occurs. The term can refer to the last few notes of a phrase, the final chord alone, or types of chord progressions suitable for phrase endings. Cadences strongly indicate the tonic or central pitch of a passage. Musicologist Edward Lowinsky proposed that the cadence was the "cradle of tonality." The four main types are authentic, half, plagal, and deceptive. Authentic cadences move from a dominant-functioning chord (commonly V) to the tonic (I), and a seventh may be added to the dominant. The Harvard Concise Dictionary notes this cadence is a microcosm of the tonal system and virtually obligatory as the final structural cadence of a tonal work. Perfect authentic cadences have both chords in root position with the tonic in the highest voice, achieving complete harmonic and melodic closure. Imperfect authentic cadences include root position, inverted, and leading-tone types. An evaded cadence moves from a dominant seventh third inversion to a first inversion tonic. Half cadences end on V, sounding incomplete, and include the Phrygian half cadence (iv6–V in minor), which gives an archaic sound due to its survival from modal Renaissance harmony, and was a characteristic Baroque gesture often concluding a slow movement before a faster one. The Lydian cadence is similar but with the iv6 raised. Burgundian cadences feature parallel fourths between upper voices. A rare plagal half cadence involves a I–IV progression.

Reader's Guide

Cadences are fundamental to tonal music, serving as structural markers that define phrases, sections, and entire works. The musicologist Edward Lowinsky proposed that the cadence was the 'cradle of tonality.' While typically classified by chord progressions, a sense of closure is essential for a progression to function as a cadence. Disputes exist, such as William Caplin's argument that plagal cadences (IV–I) rarely occur in classical-era music and instead function as postcadential codettas. The deceptive cadence (V to a chord other than I, often vi) creates a suspended effect. Cadences remain a core concept in analyzing harmony and form from the 16th century onward.

Did You Know?

The Musical Mechanism

In a standard Medieval cadence, a major sixth interval is resolved by having each note of the interval move outward by one step, expanding the distance to a full octave. The Landini cadence takes this familiar gesture and inserts a moment of unexpected contraction before the final expansion. In the upper voice, an escape tone briefly narrows the interval down to a perfect fifth, creating a fleeting sense of closure that is then immediately undone as the voice continues on to the octave. This brief dip into the fifth before the final stretch to the octave gives the cadence its distinctive, slightly restless character. An inner voice may also participate in the figure; in the standard example, that inner voice moves from F-sharp to G in the same rhythmic pattern as the lower voice, adding harmonic richness to the resolution. The result is a cadential formula that feels both resolved and gently unsettled, a hallmark of late Medieval compositional taste.

Landini's Signature

Francesco Landini (1325–1397) was an influential Italian composer whose name became permanently attached to one of the most recognizable cadential formulas of the late Medieval period. While the technique of narrowing a sixth to a fifth before expanding to an octave existed before his time, Landini distinguished himself by employing it with remarkable consistency across his body of work. This sustained, deliberate use set him apart from his contemporaries and gave the cadence its eponymous identity. The device became so strongly associated with his compositional voice that later scholars would use his name as the primary reference point for the technique. His extensive application of the figure throughout his output made it a kind of musical fingerprint, a signature gesture that listeners and analysts could recognize as distinctly his. In honoring Landini with the cadence's name, the musicological tradition acknowledges not merely that he used the device, but that he elevated it to a defining element of his artistic identity.

A Broader Tradition

The Landini cadence did not emerge in a vacuum, nor did it vanish with its namesake. The technique was a widespread feature of 14th-century and early 15th-century composition, employed by composers well before Landini and long after his death. Gherardello da Firenze appears to be the earliest composer whose surviving works demonstrate the figure, suggesting the practice predates Landini's own output. On the other end of the timeline, the cadence remained a living compositional tool well into the 15th century. It appears with particular frequency in the songs of Gilles Binchois and in the music of Johannes Wreede, both of whom carried the device forward into a new generation of composers. What distinguishes Landini from these predecessors and successors is not invention but consistency: he was the first to deploy the cadence as a recurring, defining element of his style. The broader tradition thus frames Landini not as a solitary innovator but as the composer who gave the technique its most recognizable and enduring association.

Naming and Scholarly Recognition

Despite its long history in actual musical practice, the term 'Landini cadence' is a relatively modern scholarly coinage. The name was first introduced in the late 19th century by the German writer A.G. Ritter, who used it in his 1884 work Zur Geschichte des Orgelspiels, published in Leipzig. This act of naming crystallized what had previously been an unnamed but widely recognized compositional habit into a formal, discussable concept in music theory. The alternative names for the device—'Landini sixth,' 'under-third cadence,' and 'Landini sixth cadence'—all trace back to this same moment of scholarly codification. The fact that the term emerged in the context of a treatise on organ playing suggests that the cadence had become a reference point in broader discussions of musical technique by the 1880s. Ritter's naming ensured that subsequent generations of composers, analysts, and students would have a precise label for the figure, anchoring it firmly in the academic vocabulary of Western music.

Gallery

Frequently Asked Questions

What is a cadence in music theory?

A cadence is a harmonic or rhythmic pattern at the end of a musical phrase that gives the listener a feeling of arrival or completion. Think of it as the musical equivalent of a period at the end of a sentence. The term comes from the Latin word for 'a falling,' reflecting the sense of resolution it creates.

What are the main types of cadences?

The primary subtypes include perfect authentic, imperfect authentic, deceptive, Phrygian half, and minor plagal cadences. Each one creates a different degree of finality or surprise depending on which chords resolve to which. The perfect authentic delivers the strongest sense of closure, while the deceptive deliberately avoids the expected resolution.

How does a cadence tell you what key a passage is in?

Cadences act as strong signals of the tonic because they anchor the listener's ear to the central pitch of a passage or piece. When a phrase resolves convincingly to a particular chord, that chord's root typically reveals the key center. This is why composers use cadences strategically to confirm or shift the tonal center.

What's the difference between a perfect authentic and a deceptive cadence?

A perfect authentic cadence moves from the dominant chord to the tonic in root position, delivering the strongest possible sense of finality. A deceptive cadence sets up that same dominant-to-tonic expectation but resolves to a different chord, usually the submediant, creating a moment of surprise. Both use the dominant as a springboard, but they land in completely different emotional places.

Can a cadence be rhythmic rather than harmonic?

Yes, a rhythmic cadence is a distinctive pattern of note lengths and rests that signals the end of a phrase even without a specific chord progression. It works alongside harmonic cadences to reinforce the feeling of closure. In practice, most phrase endings combine both rhythmic and harmonic elements to create a convincing sense of arrival.

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