Erhu 二胡

001Overview

The erhu (二胡) is a two-stringed bowed musical instrument that originated in China. It belongs to the bowed string family and is widely recognized for its expressive, vocal-like tone. Often called the Chinese violin or Chinese two-stringed fiddle in English, the erhu has a distinct construction that sets it apart from Western bowed instruments. Its small, cylindrical or hexagonal soundbox is covered with snake skin, and it lacks a fingerboard, allowing the player's fingers to directly contact the strings. The instrument is held vertically on the player's lap or between the knees, with the bow threaded between the two strings. This unique playing position and bowing technique contribute to its characteristic sound.

The erhu is a prominent instrument in Chinese traditional music, including folk ensembles, opera, and solo repertoire. It is also used in contemporary music, both in China and internationally, often blending with Western instruments and genres. Its portability and expressive range make it a favorite among musicians. Despite its simple appearance, the erhu demands precise control and skill to produce its nuanced tones. It is a symbol of Chinese cultural heritage and continues to evolve in modern musical contexts.

002Construction and materials

The erhu consists of a long neck (or pole) made of hardwood, such as ebony, rosewood, or sandalwood, which also serves as the pegbox. At the bottom, a small soundbox (or resonator) is attached. This soundbox is typically hexagonal or cylindrical in shape and is made of wood or sometimes bamboo. The front of the soundbox is covered with stretched python skin, which is crucial for the instrument's distinctive timbre. The back is often open or covered with a carved wooden lattice. Two large tuning pegs are inserted near the top of the neck, and two smaller pegs may be present for fine-tuning. The strings, traditionally made of silk, are now commonly steel or nylon. A small piece of felt or cloth is placed under the strings near the bridge to dampen unwanted vibrations.

The bow is made of bamboo and strung with horsehair. Unlike many bowed instruments, the bow hair is not tightened with a screw mechanism; instead, the player adjusts tension by hand. The bow is permanently threaded between the two strings, so it cannot be removed easily. A small wooden bridge sits on the snake skin to support the strings, and a loop of string (qianjin) near the top of the neck pulls the strings close to the pole. The qianjin can be moved to adjust string tension and playing feel. The overall construction is lightweight and compact, allowing for easy transport. The materials and craftsmanship significantly affect the instrument's sound quality and playability.

003How it is played

The erhu is played seated, with the soundbox resting on the player's left thigh or held between the knees. The neck is held vertically, and the left hand fingers the strings without pressing them against a fingerboard. Instead, the strings are stopped by lightly touching them with the fingertips, allowing for subtle pitch variations and expressive techniques such as slides, vibrato, and bends. The right hand holds the bow, which is inserted between the two strings. The bow is moved horizontally, and the player can play either string individually or both simultaneously. The lack of a fingerboard means that intonation relies entirely on the player's ear and muscle memory.

Bowing techniques include long bows, short bows, staccato, legato, and various off-string strokes. The player can also pluck the strings with the left hand (pizzicato) while bowing, creating rhythmic effects. The erhu's range is about three octaves, and it is capable of producing a wide dynamic range from soft, whispering tones to powerful, soaring melodies. Due to the bow being fixed between the strings, the player cannot easily switch to another instrument during performance. The playing posture and hand positions are essential for producing the instrument's characteristic vocal quality. Mastery requires years of practice to control pitch, tone, and expression.

004Sound and tuning

The erhu has a distinctive sound that is often described as plaintive, nasal, and highly expressive, resembling a human voice. Its timbre is influenced by the snake skin covering, the small soundbox, and the playing technique. The instrument produces a relatively soft volume compared to Western strings, but it can project well in ensembles. The two strings are tuned to a fifth interval, typically to D and A (the same as the two lower strings of a violin, but an octave higher). However, the actual pitch can vary depending on the piece and the player's preference. The lower string is usually tuned to D4 and the higher to A4, but some players tune to C and G or other intervals. The strings are made of metal or silk, and the tension is adjusted with the tuning pegs.

The erhu's range spans about three octaves, from D4 to D7. Its sound is rich in overtones, and the player can produce a variety of articulations, including portamento, glissando, and harmonics. The instrument is not loud, so it is often miked in large halls. In traditional Chinese music, the erhu is often used to convey melancholy or lyrical moods, but it can also play lively and rhythmic tunes. The tuning is not fixed; players may retune for different keys or styles. The lack of frets allows for microtonal inflections, which are essential in Chinese music. The sound is often compared to a crying voice, but it can also be bright and cheerful depending on the playing style.

005History and origins

The erhu has a long history that can be traced back to ancient bowed instruments from Central Asia and China. Its predecessor is believed to be the xiqin, a bowed instrument used by the Xi people, a nomadic group from Central Asia. The xiqin was described in Chinese texts as early as the Tang dynasty (618–907 CE). Over time, the instrument spread throughout China and evolved into the erhu. The name erhu literally means two-stringed barbarian fiddle, reflecting its foreign origins. During the Song dynasty (960–1279), the erhu became popular in folk music and was used in various regional ensembles. By the Ming and Qing dynasties, it had become a staple in Chinese opera, particularly in Peking opera and other regional styles.

In the 20th century, the erhu underwent significant developments. Musicians like Liu Tianhua (1895–1932) composed solo pieces and established the erhu as a concert instrument. He also improved playing techniques and promoted the instrument in educational settings. Since then, the erhu has been featured in orchestras, both traditional Chinese and Western, and has gained international recognition. Today, it is taught in conservatories and performed worldwide. The instrument continues to adapt to modern music, including jazz, rock, and contemporary classical genres. Its history reflects the cultural exchanges along the Silk Road and the dynamic evolution of Chinese music.

006Role in traditional and modern music

In traditional Chinese music, the erhu plays a central role in various genres. It is a key instrument in Chinese opera, especially Peking opera, where it often leads the melodic line and accompanies singing. It is also used in folk ensembles, such as the Jiangnan sizhu (silk and bamboo) ensembles of southern China, and in narrative singing traditions like Suzhou pingtan. In these contexts, the erhu provides melodic support, ornamentation, and emotional depth. Its expressive capabilities make it ideal for conveying the nuanced emotions of Chinese opera and storytelling. Additionally, the erhu is used in solo performances, with a rich repertoire of traditional pieces passed down through generations.

In modern music, the erhu has expanded beyond its traditional roots. It is now a common instrument in Chinese orchestras, which blend Western and Chinese instruments. Composers have written concertos and chamber works for the erhu, and it has been featured in film scores, popular music, and cross-cultural collaborations. Internationally, erhu players perform with symphony orchestras and in world music ensembles. The instrument's unique sound has attracted musicians from diverse backgrounds, leading to fusion projects that combine Chinese and Western musical elements. Despite modernization, the erhu remains a symbol of Chinese cultural identity and continues to inspire new generations of musicians.

007Frequently asked questions

Q: What is the difference between an erhu and a violin? A: The erhu has two strings, no fingerboard, and is held vertically. Its soundbox is covered with snake skin, and the bow is threaded between the strings. The violin has four strings, a fingerboard, and is held horizontally under the chin. Their playing techniques and timbres are quite different.

Q: Is the erhu difficult to learn? A: Like any instrument, learning the erhu requires dedication and practice. Its lack of a fingerboard means that intonation depends entirely on the player's ear, which can be challenging for beginners. However, with consistent practice, many people learn to play it well. It is best to study with a qualified teacher.

Q: Can the erhu be used in Western music? A: Yes, the erhu has been used in various Western musical contexts, including orchestras, film scores, and contemporary compositions. Its unique sound adds a distinctive color to ensembles. Many composers have written works specifically for the erhu, and it is increasingly heard in cross-genre collaborations.