# key

> key of wind instruments

**Wikidata**: [Q42935438](https://www.wikidata.org/wiki/Q42935438)  
**Source**: https://4ort.xyz/entity/key-q42935438

## Summary
A key is a mechanical component of wind and woodwind instruments that functions as a lever or push-button to control the device. It is classified as a simple machine and a musical instrument part, distinct from the keys of a keyboard instrument. This mechanism is essential for altering the pitch by covering or uncovering holes and is integral to the key systems of instruments like the oboe d'amore.

## Key Facts
- **Classification**: Subclass of key, lever, and musical instrument part; functions as a push-button mechanism.
- **Instrument Context**: Part of wind instruments, woodwind instruments, and key systems.
- **Mechanical Definition**: Defined as a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge (fulcrum).
- **Related Variations**: Associated with the octave key (raises pitch by an octave) and the gizmo key (found on certain flute models).
- **Distinctness**: Differentiated from the individual keys of keyboard musical instruments.
- **Documentation**: Described by Riemann's Music Dictionary and Encyclopædia Britannica Online (ID: art/key-wind-instrument).
- **Digital Presence**: Google Knowledge Graph ID is /g/11bc5g5yr8; has 9 sitelinks.
- **Multilingual**: Wikipedia entries exist in Catalan, German, Spanish, Basque, French, Galician, Italian, Dutch, and Portuguese.
- **Aliases**: Also known as clef, клавиша, and кнопка.
- **Image**: Visual representation available at https://commons.wikimedia.org/wiki/Special:FilePath/Clarinette_auriculaire_droit.jpg.

## FAQs
**What type of simple machine is a wind instrument key?**
It functions as a lever, which is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge or fulcrum. It also operates as a push-button mechanism with an area that can be temporarily pushed down to control the device.

**How does this key differ from a keyboard key?**
While both fall under the broad classification of a "key," the wind instrument key is specifically a part of woodwind and wind instruments. It is explicitly distinguished from the individual keys found on keyboard musical instruments.

**What specific types of keys are related to this entity?**
Related types include the octave key, which is a hole or key on some wind instruments used to raise the pitch by an octave or more, and the gizmo key, which is specific to certain flute models.

**What instruments utilize this component?**
This component is a part of the woodwind instrument family and is connected to the oboe d'amore, a double reed woodwind musical instrument.

**Where is this term documented?**
The term is described by Riemann's Music Dictionary and is featured in the Encyclopædia Britannica Online under the ID "art/key-wind-instrument".

## Why It Matters
The key is a critical innovation in the design of wind instruments, enabling the precise control of pitch necessary for musical performance. By acting as a lever system, it allows musicians to cover tone holes that are otherwise physically inaccessible or too small for direct finger contact. This mechanism expands the technical capabilities and range of woodwind instruments, allowing for the execution of complex chromatic passages and consistent intonation across the instrument's register.

## Notable For
- Being classified as both a lever and a push-button within mechanical engineering contexts.
- Serving as a fundamental component of the key system in woodwind instruments.
- Having specific specialized variants like the octave key and gizmo key.
- Possessing a distinct identity separate from keyboard instrument keys despite sharing the same name.
- Being documented in nine different languages on Wikipedia, indicating its universal recognition in musicology.

## Body

### Classification and Mechanical Structure
The key is fundamentally defined as a musical instrument part and a subclass of the general concept of a key. Structurally, it is categorized as a simple machine, specifically a lever, which consists of a beam or rigid rod pivoted at a fixed hinge or fulcrum. Additionally, it functions as a push-button, defined as a simple mechanism with an area that can be temporarily pushed down to control a device. It is distinct from the individual keys found on keyboard musical instruments, though it shares the same parent classification.

### Role in Wind Instruments
As a part of wind instruments and the woodwind instrument family, the key is an essential element of the instrument's key system. It is manufactured by a key maker and is utilized to alter the pitch by closing or opening holes. The entity is connected to the oboe d'amore, a double reed woodwind musical instrument, which relies on such keys for its operation. Specific variations of this component include the octave key, designed to raise the pitch by an octave or more, and the gizmo key, which is found on certain flute models.

### Documentation and Identification
The entity is well-documented across academic and reference sources. It is described by Riemann's Music Dictionary and holds a specific entry in the Encyclopædia Britannica Online with the ID "art/key-wind-instrument". In the digital sphere, it is identified by the Google Knowledge Graph ID "/g/11bc5g5yr8". The term has a significant presence on Wikipedia, with articles available in nine languages: Catalan, German, Spanish, Basque, French, Galician, Italian, Dutch, and Portuguese. It is also recognized by various aliases, including "clef," "клавиша," and "кнопка."

### Related Entities
While the primary definition pertains to the mechanical part of a musical instrument, the data source connects the entity "key" to other distinct organizations and concepts. These include Key Sounds Label, a Japanese record label established in 2001, and Kagi, a web search engine founded in 2018 in the United States with headquarters in Palo Alto. These connections are listed as related entities within the provided knowledge graph.