Pedal Point · Theory

Harmonic Function Cadence Consonance and Dissonance Chord Voicing Theme and Variations

A pedal point does one simple thing: hold one note while the chords above it keep changing.

Its name comes from the organ's pedal (hence also "organ point") — the device began as holding a note with the foot while both hands continued the harmony.

Why it accumulates tension

This is the part worth understanding, and the mechanism is not mysterious:

While the bass holds, the tension in the upper harmony cannot be resolved by the bass. Normally a dissonant chord releases when the bass moves where it ought to go; if the bass refuses to move, the tension can only pile up.

And the moment the bass finally moves, the accumulated tension discharges at once. That is why a pedal point almost always appears where something must be held back and then released:

Position	Function
dominant pedal (bass held on the dominant)	drives toward a cadence — the commonest use; it postpones the arrival a little longer
tonic pedal (bass held on the tonic)	opening exposition (fixing the centre) or closing expansion (stretching the close)
upper pedal	a high voice held, producing a "bell above" effect

How it differs from a long note

	Long note	Pedal point
Above it	need not change	must keep changing (otherwise it is merely a long note)
Function	sustains a pitch	accumulates harmonic tension

The test is blunt: does the upper harmony keep moving? If not, it is a long note; if it does, it is a pedal point.

Its relation to ground-bass variations

The most extreme use is a whole piece built on one — the ground bass (basso ostinato): a bass figure repeats while everything above is newly written each time.

It was extremely popular in the Baroque: the ground-bass variations on Greensleeves, the bass of Pachelbel's Canon, and a great many chaconnes and passacaglias. Its relation to variation form is this: change above, constancy below.

Diagram: the bass stays, everything above moves

Listen: the effect of a stationary bass

Use the progression player on a complete progression. Imagine the lowest note staying on one pitch throughout (a dominant pedal) while only the upper parts change — that is the sound of a pedal point: never resolved, so ever tighter.

Common misconceptions

"A pedal point is a long note." The test is whether the upper harmony keeps changing. If nothing above

moves, it is only a long note.

"It must be in the lowest voice." The bass is the commonest place (hence the name), but **upper and inner

voices can hold too**.

"It only belongs at the end." A dominant pedal usually drives a cadence, but a tonic pedal often opens a

piece to establish the centre (as in the first bars of many preludes).

"It is Baroque only." Romantic composers (Liszt, Wagner) used it to pile up tension, and a pop song's

sustained bass note or a dance track's held bass is the same device. :::

Listen in the library

27. Greensleeves to a Ground with DivisionC10:24Greensleeves to a Ground — the bass repeats unchanged while everything above varies, the textbook form of a pedal pointDetailsSound Ye the Trumpet CallC10:35An organ hymn — the pedal point takes its name from the organ pedal, where the device originatedDetailsDanse Macabre, S.555C110:20Liszt's transcription of Danse macabre — Romantic writing uses pedal points to pile up tension, and the refusal to move is audibleDetails

All tracks from midicn-lib — inline badge is the license tier (C1 commercial / C2 non-commercial / C3 study only).

Sources

持续低音指某一声部（通常在低音）持续不变、上方和声继续变化的织体手法，属和声学与配器通则
术语 pedal point / organ point 源自管风琴踏板，属音乐史通行记载

Used for fact-checking only; all prose is original.

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