Should the Sustain Pedal Follow the Score, the Harmony, or the Ear?

Building a Piano Piece · Article Ten

The score prints Ped. and an asterisk, so the learner depresses and releases at those locations. Another edition gives no pedal marks and uncertainty returns. On a different piano, the same foot sequence becomes blurred; a half-pedal that worked at home produces no comparable response.

Sustain pedalling belongs simultaneously to notation, harmony, instrument mechanics and situated listening. Following printed marks alone ignores changes of piano and room. Changing at every harmony ignores melodic connection, density and deliberately blended effects. Following the ear without understanding the score can allow resonance to hide fingering and rhythmic problems.

A complete principle is:

Score and harmony generate a pedalling hypothesis; instrument and room modify it; the ear remains responsible for the result.

The pedal is not an ornamental switch or universal glue for disconnected playing. It continuously controls decay, resonance, clarity and colour.

What does the sustain pedal actually change?

On an acoustic piano, the right pedal raises the dampers. Struck strings continue after keys are released, while unstruck strings can respond sympathetically. Sound becomes not only longer but different in spectrum, decay and overall energy.

Acoustic research has measured beating, partial decay and amplitude envelopes with the pedal engaged and disengaged, and modelled the effect computationally. The study by Lehtonen and colleagues shows that pedalling is not merely extending an unchanged sample. Register, open strings, dynamic, depth and timing affect the result.

Simple digital pedals recognise only on and off; more advanced instruments may transmit partial or continuous values. Even then, sensor range, sound model and loudspeaker or headphone feedback need not behave like an acoustic action. A subtle foot movement should never be assumed to produce a subtle acoustic difference unless the equipment supports it and the result can be heard.

Printed pedal marks are not a complete foot script

Composers and editors have used pedal notation inconsistently across history. Early pianos, nineteenth-century instruments and modern concert grands differ in sustain, power and damping. Historical scholarship shows that pedal marks were once often reserved for special effects; during the nineteenth century the pedal became increasingly integrated into continuous colour, and notation expanded. Rosenblum’s survey places marks within changing instruments and performance traditions.

No mark does not always mean no pedal. A long mark does not always require literally unbroken full pedal on a modern grand in a reverberant hall. Conversely, a clearly intended special resonance should not be erased merely by saying that modern pianos are more sustaining. Understand the effect before adapting its realisation.

Distinguish composer and editor where possible through the edition’s notes, sources and reliable critical information. A teacher’s marks can be a useful starting hypothesis, but the learner should still hear what depression, retention and release each do.

Harmony is a major clue, not the sole rule

“Change when the harmony changes” is a good beginning because carrying old harmony into new can blur it. It is incomplete.

Low-register partials are dense and often long-decaying; loud, rapid textures accumulate more energy; semitone-rich sonorities may need more clearing than open intervals. A melody note may need to remain across harmonic movement, and a composer may deliberately ask for mixture. The pedal can also be refreshed within one harmony for articulation or colour.

Triggers therefore include bass change, harmonic conflict, melodic connection, density, dynamic, register, articulation and intended colour. Harmony narrows the choice. Listening decides whether the actual mixture remains intelligible.

Learn three basic timing relationships

Direct or simultaneous pedal

The note and pedal descend approximately together, often to accent or open resonance immediately. Dampers raised before a hammer strike create different resonance from a pedal applied just after it; hear the effect on the present instrument.

Legato or syncopated pedal

Sound the new harmony, then rapidly release the old pedal and depress it again. The fingers briefly preserve the new sound while old resonance clears, allowing connection without a gap. Exaggerate the sequence—play, then change—before making the timing more compact.

Partial pedal and flutter clearing

The pedal is not only fully down or fully up. Partial release brings dampers towards the strings and changes decay; shallow, rapid refreshes can clear accumulated sound without making the texture completely dry. Effective travel differs among instruments, so a fixed ankle angle is not portable.

These categories describe operations, not a prescription for every piece. Keeping the heel stable and controlling with the forefoot often supports precision, but bodies, benches and instruments differ. Persistent discomfort requires adjustment and guidance.

A no-pedal-to-pedal workflow

First play the passage without pedal to establish fingering, finger connection, release, voices and rhythm. This is not an argument for a dry final performance. It exposes problems that resonance may hide.

Second, play bass and harmonic skeleton and mark obvious refresh points. Third, add melody and identify notes that must connect beyond what fingers can hold. Fourth, begin with shallow or relatively frequent clearing and add resonance towards the target. It is often easier to hear the cause this way than to begin with full pedal and guess which mixture is excessive.

Fifth, record and listen away from the keyboard because the performer’s position contains more action noise and a different balance of direct and reflected sound from the audience position. Sixth, recalibrate on another piano or in another room. The foot sequence is not immutable source text.

Example: Debussy’s “La cathédrale engloutie”

Debussy’s prelude “La cathédrale engloutie” builds a sounding architecture from broad chords, sustained resonance and shifting registers. The score is available through IMSLP. A rule of one pedal change per bar can miss internal colour; maximum resonance throughout can let bass and thick chords obscure every layer.

Begin with no pedal or minimal pedal to understand chord connections and voices, identifying notes that genuinely require finger holding. Play bass and principal chords while comparing full, shallow and partially cleared pedal. With full texture restored, thicker, lower and louder passages usually need more active adaptation than thin, high-register material.

A general article cannot supply bar-by-bar footwork. Instrument, room, tempo, edition and interpretation all matter. The testable goal is whether resonance enlarges the architectural sonority while harmony and layers remain perceptible.

How to hear a pedal problem

Do not ask only whether the sound is “muddy”. Ask whether the old bass remains dominant after a new one arrives; whether melodic tails are cut too soon; whether clean harmonic changes contain dry gaps; whether loud resonance accumulates into the next phrase; or whether release creates a mechanical noise or abrupt acoustic cliff.

Record A/B versions: one deliberately drier than expected, one wetter, and a third between them. Extreme contrast makes the ear’s requirement easier to identify than a series of imperceptibly small changes. Recording bass and pedal alone can remove the distraction of a dense texture.

What the pedal cannot repair

It cannot solve unstable pulse, wrong harmony, uncontrolled accompaniment, unreleased fingers or unclear voices. It may conceal them temporarily and make failure worse on another instrument.

If a phrase collapses without pedal, distinguish music that genuinely requires pedal connection from weak fingering and finger control. Notated tones impossible to hold manually may give the pedal a structural task. Simple legato that needs a continuous wash may first need basic connection.

A final pedalling solution is never merely foot memory. It is a loop of listening to decay and adjusting to the environment.

Pedal notation tells us what composer or editor imagined; harmony tells us which sounds may conflict; the instrument tells us what physically occurs. Only the ear can turn all three into a responsible decision now.

Primary sources and further reading

• Analysis and modelling of piano sustain-pedal effects
• Historical survey of piano pedalling and performance practice
• Nineteenth-century acoustics and pedagogy of piano pedalling
• Acoustics, perception and production of legato articulation

Continue reading: Building a Piano Piece series page

If you would like to bring these ideas about listening, understanding, and practice to the keyboard, you might try ScoreFlow, an app I developed to make score reading and daily practice flow more naturally together.