Harpsichords and Clavichords

In Short

This text offers a clear study of the historic stringed keyboard collection preserved at the Smithsonian Institution. It examines the mechanical designs, regional variations, and sound production of harpsichords and clavichords, which dominated music making from the fifteenth through the eighteenth centuries. By detailing individual instruments—ranging from Flemish virginals to massive English harpsichords—it documents the craftsmanship of early builders. The work endures as an essential guide to organology, illustrating how technical innovations in string tension, case construction, and action directly shaped classical composition before the rise of the piano.

The Story

The narrative follows the technological and artistic trajectory of stringed keyboard instruments across several centuries of European craftsmanship. It opens by establishing the fundamental division in early keyboard mechanics: the plucked action of the harpsichord family and the struck action of the clavichord.

The structural evolution begins with the Flemish workshops of Antwerp, particularly those of the Ruckers family. These builders established key standards by adding second manuals and octave string sets to single-keyboard models. They also refined interior construction, pairing functional efficiency with painted soundboards and decorative block-printed papers.

The focus then shifts southward to examine Italian harpsichord construction. Italian makers prioritized lightweight, thin-walled cases, usually housed inside heavier, decorative outer shells. Utilizing two unison string sets, these instruments produced a distinctively crisp tone that proved ideal for underlying basso continuo accompaniment in ensemble playing. Italian workshops also experimented with split keys and meantone tuning adaptations to solve tonal inaccuracies across different musical keys.

Cross-channel developments bring English harpsichord making into view. Centered in eighteenth-century London under builders like Jacob Kirckman and Burkat Shudi, English workshops produced heavy-cased instruments veneered in fine woods. These models featured lush tonal profiles, five-octave ranges, dynamic hand stops, and specialized mechanical lute stops. Concurrently, smaller domestic instruments such as the spinet became ubiquitous fixtures in modest early English and American households.

In France, builders such as the Blanchet family and Pascal Taskin dedicated effort to ravalement—the structural rebuilding and modernization of older Flemish instruments to fit eighteenth-century French tastes. French innovations added multi-manual shove couplers, delicate leather plectra, and expressive knee levers to alter dynamics.

The final phase explores the mechanics of the clavichord. Operating via brass tangents that remain in contact with strings to allow delicate dynamic nuances and vibrato, the instrument remained hindered by its low volume, restricting it to solo practice. As musical performance migrated to larger public halls requiring greater volume and dynamic range, builders attempted to modify harpsichords with muting pads and swell effects. Finding these mechanical additions insufficient, instrument makers ultimately adapted these structural foundations to construct the modern pianoforte, rendering older plucked and tangent instruments largely obsolete until their late nineteenth-century historical revival.

How It Unfolds

Mechanics of the Plucked String Initial steps detail how pressing a key raises a wooden jack, driving a quill or leather plectrum past a string to create sound, followed by a felt damper stopping the vibration upon key release.

Flemish Innovations Antwerp artisans introduce second keyboards and supplementary string choirs, expanding pitch range and tonal color while setting interior decorative standards with painted soundboards.

Italian Lightness and Tuning Italian makers assemble thin-cased, highly resonant instruments featuring crisp attack for continuous bass lines, occasionally integrating split keys to overcome the limits of meantone temperament.

English Fine Cabinetry Eighteenth-century London workshops produce heavy, veneered five-octave harpsichords alongside spinets, utilizing intricate stop knobs and crow quills to generate thick, resonant tones.

French Modernization Parisian craftsmen focus on altering historic Flemish instruments through ravalement, introducing multi-keyboard shove couplers, softer leather plectra, and expressive knee levers.

The Clavichord's Subtle Touch Detailed analysis shows how metal tangents strike strings directly to grant tactile dynamic control and vibrato, though limited acoustic projection restricts the instrument to private study.

Evolution Toward the Piano Musical demands for greater dynamic range drive experiments in muting mechanisms, leading craftsmen to combine harpsichord and clavichord case designs into the early layout of the pianoforte.

The People

The Ruckers Family As Antwerp's foremost instrument builders, they seek to expand the tonal potential of early keyboard instruments. By adding second manuals, higher octave string choirs, and decorative block-printed paper interiors, they establish the northern European standard that influences harpsichord construction for generations.

Johann Daniel Dulcken A Flemish craftsman focused on building substantial two-manual instruments. He integrates specialized lute stops set close to the string nut, producing a sharp, nasal tone that expands the instrument's expressive capabilities.

Jacob Kirckman and Burkat Shudi Immigrant Swiss apprentices who become the primary figures of English harpsichord manufacturing in London. They aim to supply aristocracy and international figures, like Thomas Jefferson, with large five-octave instruments housed in veneered cases that deliver lush sound.

The Blanchet Family and Pascal Taskin Parisian builders who specialize in ravalement, the art of taking older Flemish harpsichords and expanding their physical framework. They enlarge cases and soundboards, replace key actions, and introduce leather peau de buffle plectra to satisfy French preferences for light action and altered tone colors.

Benoist Stehlin A mid-eighteenth-century French maker whose surviving harpsichords highlight the practical integration of shove couplers, allowing players to connect upper and lower manuals seamlessly by pushing key beds into place.

In Its Own Voice

"The sound of a harpsichord is not greatly altered by increasing or lessening the impact of fingers on the keys."

Context: An explanation of why harpsichord builders had to rely on multiple string sets, muting pads, and varied plucking points rather than finger pressure to modify volume.

"The Italian harpsichord serves as an ideal basso continuo keyboard instrument because it blends well in instrumental combinations."

Context: A description of the physical attributes of lightweight Italian instruments, noting how their clear attack allows intricate polyphonic lines to stand out in an ensemble.

"Dynamic shadings are possible in the clavichord, as in the piano, through variation of finger pressure."

Context: A comparison between the striking action of metal tangents in a clavichord and the felt hammers of a modern piano, emphasizing their shared tactile control over dynamics.

What It's Really About

At its core, the text explores the interplay between mechanical engineering, physical materials, and musical aesthetics. It demonstrates how acoustic constraints force technical solutions: because a plucked string cannot vary its dynamic output through finger stroke alone, artisans must design elaborate systems of multiple manuals, stops, split keys, and coupler mechanisms.

The narrative reveals how national styles reflect different musical priorities, whether through the light, crisp attack of Italian single-manual instruments built for ensemble support, or the complex, multi-choir English and French designs created for solo performance. Ultimately, it illustrates how evolving artistic demands for dynamic expression eventually pushed existing plucked mechanisms past their structural limits, driving the transition to hammer-struck instruments.

Why Read It Today

Organologists, classicists, and early music enthusiasts will appreciate this historical overview of antique keyboard design. The text provides a concise, direct look into the construction techniques of historic workshops. Reading it offers an appreciation for the physical ingenuity hidden behind eighteenth-century music, clarifying how specific mechanical actions produced the precise timbres required by period compositions.

The work demands close attention when navigating specialized organological nomenclature—such as pitch notations ($8'$, $4'$), split-key enharmonic tuning layouts, mean-tone temperaments, and internal action parts like jacks, tangents, and plectra. However, its clear descriptions and historic context make the technical details easy to grasp. What remains with the reader is an understanding of the piano not as a sudden invention, but as the natural outcome of centuries of structural refinement by master harpsichord and clavichord builders across Europe.