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Musical instruments

78 musical instruments with museum photographs, history and construction from Wikipedia, names in other languages and their Hornbostel–Sachs class.

How instruments are grouped

Hornbostel–Sachs or Sachs–Hornbostel is a system of musical instrument classification devised by Erich Moritz von Hornbostel and Curt Sachs. This system was first published in the Zeitschrift für Ethnologie in 1914. An English translation was published in the Galpin Society Journal in 1961, which is the most widely used system for classifying musical instruments by ethnomusicologists and organologists (people who study musical instruments). The system was updated in 2011 as part of the work of the Musical Instrument Museums Online (MIMO) Project.

Hornbostel and Sachs based their ideas on a system devised in the late 19th century by Victor-Charles Mahillon, the curator of musical instruments at Brussels Conservatory. Mahillon divided instruments into four broad categories according to the nature of the sound-producing material: an air column; string; membrane; and body of the instrument. From this basis, Hornbostel and Sachs expanded Mahillon's system to make it possible to classify any instrument from any culture.

Formally, the Hornbostel–Sachs is modeled on the Dewey Decimal Classification for libraries. It has five top-level classifications, with several levels below those, adding up to over 300 basic categories in total.

Source: Wikipedia, “Hornbostel–Sachs” — CC BY-SA 4.0 — text excerpted as published; authors. Revision of 2026-01-04. The four groups below follow its top-level classes.

Aerophones wind instruments

Aerophones primarily produce their sounds by means of vibrating air. The instrument itself does not vibrate, and there are no vibrating strings or membranes.

Excerpt from Wikipedia, “Hornbostel–Sachs” (CC BY-SA 4.0), the section on aerophones.

Chordophones string instruments

Chordophones primarily produce their sounds by means of the vibration of a string or strings that are stretched between fixed points. This group includes all instruments generally called string instruments in the west, as well as many (but not all) keyboard instruments, such as pianos and harpsichords.

Excerpt from Wikipedia, “Hornbostel–Sachs” (CC BY-SA 4.0), the section on chordophones.

Idiophones bells, gongs, rattles and other self-sounding bodies

Idiophones primarily produce their sounds by means of the actual body of the instrument vibrating, rather than a string, membrane, or column of air. In essence, this group includes all percussion instruments apart from drums, and some other instruments. In the Hornbostel–Sachs classification, idiophones are first categorized according to the method used to play the instrument. The result is four main categories: struck idiophones (11), plucked idiophones (12), friction idiophones (13) and blown idiophones (14). These groups are subsequently divided through various criteria. In many cases these sub-categories are split in singular specimens and sets of instruments. The class of idiophones includes the xylophone, the marimba, the glockenspiel, and the glass harmonica.

Excerpt from Wikipedia, “Hornbostel–Sachs” (CC BY-SA 4.0), the section on idiophones.

Membranophones drums and other skin-headed instruments

Membranophones primarily produce their sounds by means of the vibration of a tightly stretched membrane. This group includes all drums and kazoos.

Excerpt from Wikipedia, “Hornbostel–Sachs” (CC BY-SA 4.0), the section on membranophones.

Electrophones electric and electronic instruments

The fifth top-level group, the electrophones category, was added by Sachs in 1940, to describe instruments involving electricity. Sachs broke down his 5th category into 3 subcategories: 51=electrically actuated acoustic instruments; 52=electrically amplified acoustic instruments; 53= instruments which make sound primarily by way of electrically driven oscillators, such as theremins or synthesizers, which he called radioelectric instruments. Francis William Galpin provided such a group in his own classification system, which is closer to Mahillon than Sachs–Hornbostel. For example, in Galpin's 1937 book A Textbook of European Musical Instruments, he lists electrophones with three second-level divisions for sound generation ("by oscillation", "electro-magnetic", and "electro-static"), as well as third-level and fourth-level categories based on the control method. Sachs himself proposed subcategories 51, 52, and 53, on pages 447–467 of his 1940 book The History of Musical Instruments.

Excerpt from Wikipedia, “Hornbostel–Sachs” (CC BY-SA 4.0), the section on electrophones.

78 instruments, 608 museum photographs. An instrument gets a page only when it has at least three distinct photographs in the open-access collections of the Metropolitan Museum of Art, the Cleveland Museum of Art, the Rijksmuseum, the Smithsonian or Europeana, and an English Wikipedia article long enough to quote. Sources and licences are on the credits page.