In single reed (saxophone, for example) and double reed (oboe) instruments, the one or two reeds are part of the mouthpiece. In reed instruments, the vibration of a reed or reeds begins the air vibration. When the instrument is tube-shaped, the blowhole can be in the end ("end-blown", as in panpipes), or in the side of the instrument ("side-blown", as in a fife). In blowhole instruments, the air is blown across the sharp edge at the blowhole. In whistles, the air is blown at a sharp edge in the instrument (as in recorders as well as police whistles). They can be plucked or bowed (with a second, smaller bow).įigure 4: The melodeon, like its close relatives the accordion and the concertina, is a free-reed aerophone. In a musical bow, the string or strings are stretched from one end of a wooden bow to the other. In harps (like the orchestral harp and the Irish harp), the strings leave the resonator at a slant (smaller than a right angle) up to a neck connected to the resonator. In lyres, the strings leave the resonator at right angles to an edge and run to a cross bar that is held away from the resonator(as in the classical Greek lyre that is so often used as a symbol of music). They may be plucked (guitar, banjo) or bowed (violin, fiddle) In lutes, the strings stretch across the resonator and up a neck. The strings can be struck (as in a piano or hammered dulcimer) or plucked (harpsichord or Appalachian dulcimer). Some have fingerboards with or without frets some have a keyboard with a complex mechanism many are simply a multitude of strings strung from one end of the resonator to the other. The resonator can be a hollow tube, a gourd, a board, a hollow box, or even a pit in the ground. In zithers, the strings are stretched across, over, or inside a resonator, or between two resonators.
( Resonators pick up the original vibrations and vibrate sympathetically with them, amplifying the original sounds and altering them so that they sound more musical.) Subcategories depend on how the string is played (plucked or bowed for example), and types of resonators.įigure 1: A banjo is classified as a plucked lute chordophone.įigure 2: Harps are one of the main subcategories of chordophone. The main groups of chordophones are classified according to the relationship between the strings and the resonator. In a chordophone, the sound is made by vibrating strings. Familiar instruments in each category are mentioned when possible some categories, while very popular around the world, will not have any specific instruments that are widely familiar. Here is an introduction to the major groups in each of these categories. Some musicologists also include a separate category for electrophones.
The major categories are chordophones, aerophones, membranophones, and idiophones. More accurate - Instruments are grouped according to how sounds are produced, not according to which instruments the composer is likely to group them with in the music or which orchestra member is likely to play them. More inclusive - Any instrument can be categorized. More specific - Categories are subdivided into smaller and smaller categories, making a sort of family tree of related instruments (related by function, not by history). The Hornbostel-Sachs method is more specific, more inclusive, and more accurate:
This method can be used to classify any instrument and is now preferred by most musicologists. The other way, first published in 1914 by Erich von Hornbostel and Curt Sachs, is to group instruments according to how their sounds are produced. However, it is difficult or confusing to apply to the many non-orchestral instruments. This method is more widely recognized, particularly among non-musicians, and it is very useful in its traditional setting, Western classical and art music. One way is to group them as they are in a Western orchestra: strings, woodwinds, brass, and percussion. There are two common ways to classify musical instruments. To explain the different instruments and the classification system for all musical instruments.
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