Orchestra 06 - Brass Mystery Cache
Hidden : 1/16/2016
Difficulty:
3.5 out of 5
Terrain:
1.5 out of 5

Size: Size: other (other)

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Geocache Description:

Another in the Orchestra Geo Art series. Urban caches all within Durban Metro. BYOP. Some cannot take swag. Random caches hold clues for a Bonus Cache! Find all 26!

 

Have Fun and Enjoy! Please return cache as found :)

 

Instruments from the Brass Family create sound by air vibrating in a tubular resonator in sympathy to the vibration of the player's lips. They are classified as Labrosones. The metallic content has nothing to do with the sound production.

There are two groups of Brass instruments – Valved, and Slides. Valved instruments contain certain valves (usually 2 or 3) which open up additional pathways for air to resonate within. These air passages are known as Crooks. The valves are mostly piston type valves, although occasionally a rotary valve is used.
Slides simply increase or decrease, the length of tubing used for resonance. The Trombone is a fine example.
Critical to the nature of the sound created is the bore of the tubes, as well as the diameter in relation to the overall length. The bore could be cylindrical, where the tube diameter remains constant; or the tube could be conical where the diameter increases toward the bell, or end of the instrument. Cylindrical bores produce a brighter more penetrating tone, while conical bores result in a more mellow and pleasing tone.
The length of tubing also results in influencing the sound. Full length tubing (Tuba & Euphonium) are able to play fundamental notes with precision, while half tubes are more designed to produce overtones (Trumpet & French Horn).
Brass instruments make use of the player as an integral component of sound creation. The vibration of the lips, known as Embouchure, is essential to the sound produced.
Sound made with a Brass instrument emminates from the Bell of the instrument. This makes the sound very directional, and thus difficult to record electronically. It is also for this reason that the Tuba bell is shaped to open in a forward orientation.

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