Harmony

Harmony is the vertical dimension of pitch

Harmony concerns pitches that occur together and the relationships among them. This is why introductory texts often call harmony the vertical aspect of music: if a score is read from bottom to top at one moment, the pitches sounding at that moment form a vertical combination. A melody, by contrast, is a succession of pitches through time. The distinction is not a competition between two kinds of music; it is a way of separating two features that often work together.

Imagine a singer carrying a tune while a keyboard plays several notes underneath. The singer's sequence can be described melodically: it rises, falls, repeats, or leaps. The keyboard's notes can be described harmonically when they sound together as a support for that tune. If the keyboard changes its simultaneous pitch combination while the singer holds a single pitch, the harmony has changed even though the melody has not moved. If the singer adds a new pitch while the keyboard combination remains stable, the melody has changed while the accompaniment may be harmonically stable.

Harmony should also be kept separate from rhythm and tempo. A guitarist can strum the same chord in several rhythmic patterns without changing the chord itself. The tempo can speed up while the chord sequence remains the same. Dynamics can make an accompaniment louder or softer without changing its pitches. Texture describes the number and relationship of musical layers; a homophonic texture, for example, often places one melody over chordal accompaniment, but texture is the arrangement of layers rather than the pitch relationship called harmony.

Not every musical practice organizes pitch in the same way or gives harmony the same role. The basic vocabulary in this lesson comes from common Western introductory music theory, where chords and progressions are frequent analytical tools. It is useful within that scope, but it should not be imposed as the only way to hear or value music. The first task is to listen for what actually occurs: simultaneous tones, a drone, an accompaniment pattern, independent lines, or no clear vertical support at all.

Chords and progressions give harmony changing shapes

In the cited introductory text, a chord brings together three or more pitches played or sung at once. A three-note chord built from stacked thirds is called a triad in common Western terminology. This lesson does not require you to identify every chord quality or spell notes on a staff. Instead, begin by recognizing the listening event: several pitches arrive together, continue together, or are replaced by a new simultaneous grouping.

A series of chords is called a chord progression. Progressions let harmony unfold through time even though each individual chord is vertical. A listener may hear a repeated four-chord pattern, a lingering chord beneath a phrase, or faster chord changes near a transition. The pattern of how often chords change is sometimes called harmonic rhythm. It is different from the rhythm of individual instruments: an arpeggiated accompaniment may play many notes while outlining one chord, whereas a band may strike a new chord only once each measure.

This difference is important for analysis. Suppose a pianist plays the notes of one chord one at a time, from low to high, while a singer sustains a melody. The individual attacks are sequential, but the pitches can still outline a single harmony. The cited text calls a chord played separately rather than simultaneously a broken chord or arpeggio. A listener should therefore ask both what pitches are implied together and how the performance distributes them in time. That question prevents the mistake of equating a busy accompaniment with many harmonic changes.

A chord progression can supply orientation for a melody without becoming the melody itself. In a simple song, the tune may repeat while the chord progression changes under it, or the progression may repeat while a performer varies the tune. Either relationship gives evidence about musical form and variation. For a beginning report, avoid naming a theoretical label that the recording cannot support. It is enough to say, for example, that a stable accompaniment changes to a new simultaneous pitch grouping at the start of each phrase.

Consonance and dissonance describe relationships in context

Introductory Western theory often describes some intervals and chords as relatively consonant and others as relatively dissonant. In that framework, consonance can be associated with stability or rest, while dissonance can be associated with tension, friction, or a pull toward change. The LOUIS text explains these tendencies while also making an important qualification: hearing consonance as sweet and dissonance as harsh is shaped not only by physical sound properties but also by musical socialization.

That qualification changes how we use the terms. Consonance and dissonance should not become universal rankings of good and bad sound, nor should they be used to assume that every listener experiences the same response. They are more useful as relative descriptions inside a particular musical setting. A pitch combination that creates tension in one passage may be familiar, expected, or stable in another style or performance context. A later chord may sound more settled relative to what came before without requiring a claim about all music or all listeners.

The word resolution is often used when a tension-bearing musical event moves to one that listeners in a given style hear as more settled. This can be a useful observation, but it needs a reference point. Rather than saying, "This chord resolves because it is supposed to," describe the evidence: "The first combination is held briefly, then changes to a more stable-sounding chord at the phrase ending in this tonal passage." The first statement assumes a rule; the second tells another listener what to check.

Harmony can also be dense or sparse, stable or changing, but those are not interchangeable labels. A dense chord may stay in place for a long time; a simple chord may change rapidly. A loud dissonance is not automatically a more important harmonic event than a soft consonance. Keep pitch relationship, duration, dynamics, and texture in separate columns of your mental listening notes.

Listen for support, change, and uncertainty

A useful first harmony analysis has four steps. First, identify whether more than one pitch is sounding at once or whether a sequence seems to outline a simultaneous grouping. Second, notice whether that grouping remains stable or changes. Third, compare those changes with a melody or phrase: does an accompaniment change when the melody begins, pauses, or returns? Fourth, describe how confidently you can hear the result. A short or noisy excerpt may not reveal enough to name a chord, but it can still support a smaller observation such as "low and middle pitches remain together beneath the voice, then move together at the next phrase."

This method also works when harmony is not supplied by a familiar piano or guitar part. A vocal group may create vertical combinations; a string ensemble may move several lines at once; a bass and drone may establish a pitch background. In polyphonic music, multiple melodic lines can create harmonic results even when no performer is simply "playing chords." The analysis should name the texture as needed and avoid pretending that every passage has one obvious accompaniment.

Harmony becomes clearer when the listener reports an audible relationship rather than merely listing labels. Explain what sounded together, what changed, what remained, and how the vertical pitch combination related to the line you followed. That is the bridge from a first impression to a responsible musical description.