Harps look deceptively simple from across a concert hall, just a tall triangular frame and a wall of strings, but the mechanism that lets a harpist change key in the middle of a piece is genuinely intricate. A concert pedal harp uses seven foot pedals, each with three positions, to reshape its entire tuning on the fly, while a smaller lever harp relies on hand-operated levers that a player sets before playing rather than during a piece. Both instruments start from the same basic idea: a diatonic (scale-based) tuning that is then adjusted sharper or flatter as needed. This guide explains how pedal and lever harps work, why the pedal harp's coordination demands are considered among the most difficult of any orchestral instrument, and what to listen and look for when you encounter either type.
Key Ideas
- Harps are tuned diatonically at their base, usually to the key of C-flat major, rather than chromatically like a piano.
- A pedal harp uses seven foot pedals, each with three positions, to raise or lower every note of a given letter name by a half step at once.
- A lever harp uses small hand-flipped levers on individual strings, set before playing rather than changed mid-performance in most cases.
- Because each pedal affects every octave of its note simultaneously, pedal harp playing requires real-time foot coordination alongside independent hand technique.
- Lever harps are generally lighter, less expensive, and more common in folk and beginner settings, while pedal harps dominate orchestral and classical repertoire.
Two Main Types of Harp
The modern harp world is generally divided into two broad categories. The pedal harp, sometimes called the concert grand harp, is the large instrument most associated with orchestras and classical performance, built with a mechanism of seven floor pedals that let a player change pitch quickly and precisely while playing. The lever harp, also called a folk harp or Celtic harp depending on style and tradition, is typically smaller, lighter, and uses small levers mounted directly on the strings near the top of the neck, which a player flips by hand. Lever harps are widely used in folk, Celtic, therapeutic, and educational settings, partly because they are considerably less expensive and more portable than a full pedal harp, and partly because many folk repertoires do not require the rapid, mid-piece key changes that pedals make possible.
| Feature | Pedal Harp | Lever Harp |
|---|---|---|
| Pitch-changing mechanism | Seven foot pedals, each with three positions | Hand-operated levers on individual strings |
| Typical timing of changes | Can be changed quickly during performance | Usually set before playing, not mid-phrase |
| Typical size and weight | Large and heavy, often over 80 pounds | Smaller and considerably lighter |
| Common settings | Orchestral and classical performance | Folk, Celtic, educational, and therapeutic settings |
| Typical cost | Generally the most expensive harp type | Generally more affordable and beginner-friendly |
Diatonic Tuning as the Starting Point
Unlike a piano, which has a separate key or string for every chromatic pitch, a harp's open strings are tuned diatonically, most commonly to the key of C-flat major on a pedal harp. This means the untouched strings already form a usable scale rather than a full set of twelve pitches per octave. Every other note, including the ones that would correspond to black keys on a piano, is produced by mechanically shortening a string's vibrating length rather than by having a dedicated string for it. This diatonic starting point is part of why harp tuning and the pedal or lever system are so closely linked: the mechanism exists specifically to reach the "in-between" pitches that the base tuning does not already provide. For more on how different instruments handle scales and pitch systems generally, see how tuning systems work on string instruments.
How Pedals Change Pitch
Each of a pedal harp's seven pedals corresponds to one note letter name (D, C, B, E, F, G, and A, arranged left to right in that order on most instruments) and controls every string of that letter across the entire instrument at once. Each pedal has three notches or positions: flat, natural, and sharp. Pressing a pedal rotates small discs near the top of the harp that grip the string at a slightly shorter point, raising its pitch by a half step per position change, while all the other strings of different letter names remain unaffected. This system lets a trained player reach keys and chromatic notes that the open strings alone cannot provide, and because a single pedal affects every octave of its note simultaneously, a harpist can execute what sounds like a key change across the full range of the instrument with a single foot movement.
How Levers Work on Folk Harps
A lever harp achieves a similar basic goal through a much simpler mechanism. Each lever is mounted on an individual string, usually near the top of the neck, and flipping it engages a small mechanism that shortens that one string's effective length, raising its pitch by a half step. Because each lever affects only a single string rather than every octave of a note at once, a player wanting to shift the whole instrument into a new key must flip several levers individually. This is manageable when done before a piece begins, but it is considerably harder to do quickly in the middle of a phrase, which is one reason lever harps are generally associated with repertoire that does not require rapid mid-performance key changes.
Why Pedal Coordination Is Considered So Demanding
Playing a pedal harp well requires a harpist to manage three largely independent physical tasks at once: two hands plucking and placing strings with precise technique, and feet operating pedals that must land in the correct of three positions without looking down for long, all while reading music and maintaining musical phrasing. Because a single pedal controls an entire note letter across all octaves, a mistimed pedal change can throw off pitch across the whole instrument rather than in just one register, which raises the stakes of precise foot technique. Advanced harp repertoire frequently calls for rapid pedal changes in the middle of fast passages, sometimes requiring a player to anticipate a pedal change several measures ahead of when the new pitch is actually needed. This combination of full-body coordination, advance planning, and the unforgiving nature of a shared mechanism across the whole range is a major reason pedal harp technique takes many years to develop at a professional level.
Key Terms
- Diatonic tuning
- A tuning scheme based on a standard major or minor scale rather than every chromatic pitch; a harp's open strings are tuned this way.
- Pedal harp
- A large harp equipped with seven foot pedals, each with three positions, used to change pitch during performance.
- Lever harp
- A smaller harp using hand-operated levers on individual strings, typically set before playing rather than mid-performance.
- Enharmonic
- Describing two different note names that produce the same pitch, a concept harpists rely on when planning pedal settings.
- Disc mechanism
- The rotating mechanism inside a pedal harp's neck that shortens a string's length when a pedal is pressed, raising its pitch.
- Glissando
- A sweeping slide across many strings in sequence, a signature harp effect often associated with dramatic musical moments.
Common Misconceptions
"A harp has a separate string for every possible note." In fact, the open strings are tuned diatonically, and most other pitches are produced mechanically through pedals or levers rather than by adding more strings.
"Lever harps are just simplified pedal harps for beginners." While lever harps are often more affordable and are commonly used by beginners, they are also serious instruments in their own right within folk and Celtic traditions, not merely stepping-stones to a pedal harp.
"Harp pedals work like piano pedals, just adding sustain or volume." Harp pedals do something entirely different: they physically change the pitch of specific strings rather than altering sustain or loudness.
What to Listen For
Listen for the harp's characteristic glissando, a rapid sweep across many strings that is hard to produce convincingly on most other instruments. Notice moments where a melody seems to shift smoothly into a different key or introduces unexpected sharps or flats; on a pedal harp, this is often the sound of a pedal change happening in real time. In orchestral recordings, listen for how the harp frequently provides shimmering arpeggios or sustained chordal texture underneath other instruments rather than carrying the main melodic line throughout. On a lever harp recording, especially in Celtic or folk music, listen for a simpler, more diatonic harmonic language, since the instrument's mechanics make rapid chromatic shifts less practical mid-performance.
Getting Started
Most beginners, especially those unsure whether they will stay with the instrument long-term, start on a lever harp because of its lower cost, lighter weight, and gentler learning curve compared to a full pedal harp. If classical or orchestral repertoire is the eventual goal, transitioning to a pedal harp later is common, though it does require learning an entirely new physical coordination skill involving the feet. Because harps are large and can be expensive, many students begin by renting an instrument, and renting versus buying a beginner instrument walks through the considerations involved. The harp's relatively large size also raises practical questions covered in how instrument size affects comfort and technique. For a broader sense of how to weigh the harp against other options, how to choose your first string instrument is a useful starting point, and if you are interested in how other cultures build mechanisms for changing pitch on a large plucked instrument, the koto offers an interesting point of comparison, since it uses movable bridges rather than pedals or levers to adjust pitch.
Frequently Asked Questions
What is the main difference between a pedal harp and a lever harp?
A pedal harp uses seven foot pedals to change pitch quickly during a performance, while a lever harp uses hand-operated levers on individual strings that are generally set before playing rather than changed mid-piece.
Why are harp strings tuned diatonically instead of chromatically?
Starting from a diatonic, scale-based tuning keeps the open strings directly usable for most melodic and harmonic material, while the pedal or lever mechanism handles the additional chromatic pitches as needed.
Why is pedal harp technique considered so difficult?
Because a single pedal affects an entire note letter across every octave at once, players must coordinate precise foot movements with independent hand technique, often planning pedal changes measures in advance.
Can a beginner start on a pedal harp instead of a lever harp?
It is possible, but many teachers recommend starting on a lever harp first because of its lower cost and simpler mechanics, saving the added pedal coordination for later study.
Is a lever harp only used in folk music?
It is most strongly associated with folk, Celtic, and educational settings, but it is a legitimate and expressive instrument in its own right, not simply a limited version of a pedal harp.
- Grove Music Online
- The New Grove Dictionary of Musical Instruments
- The Metropolitan Museum of Art, Department of Musical Instruments
- Oxford Companion to Music