Windsavers are valves used in instances wherein two reeds are in the same cell and there is frequent unnecessary air passage through the non-playing reed. The cover plate protects the reed-plates. This could be made of wood, plastic, or metal. The two types of cover plates are those with the traditional open design and those with enclosed designs. The Shudi and Kirkman firms in England manufactured harpsichords that had great sonority and power while German builders added two foot and sixteen foot choir which expanded its repertoire. The harpsichord by German builders was the foundation for the design by modern builders. The harpsichord was overshadowed by the piano in the 18th to 19th century. To understand this better, picture out the violin which is sometimes regarded as a fingerboard lyre compared to the piano which is a keyed zither. On the other hand, organologists all around the world has come to an agreement that harps are completely different from the lyre and zither. Zithers and lyres have strings that are fastened to at least a point on the tailpiece or wrest pins near the soundboard and lie parallel to it. The bell extends upward. The tenor joint connects the bell and the boot which is at the bottom of the instrument. Fourth is the wing joint which is from boot to crook in length while fifth is the crook, a metal tube that joins the reed and wing joint. And last but certainly not the least is the reed. The placement of the castanets may vary depending on the music genre. A skilled castanet player has very swift movements with castanets which produce great rhythm counterpoint for dancing like the Flamenco dance or for accompanying other instruments. Structure A set of castanets looks similar to two small chestnut shells or clamshells. It was very popular until the 1850 s and was played in compositions by a bandmaster of West Point s the United States Military Academy Band, Richard Willis. Uses of the bugle Bugles are used for bugle calls which indicate the start of camp daily routines. These were also for assembling leaders and for announcing marching commands in camp.