服务承诺
资金托管
原创保证
实力保障
24小时客服
使命必达
51Due提供Essay,Paper,Report,Assignment等学科作业的代写与辅导,同时涵盖Personal Statement,转学申请等留学文书代写。
51Due将让你达成学业目标
51Due将让你达成学业目标
51Due将让你达成学业目标
51Due将让你达成学业目标私人订制你的未来职场 世界名企,高端行业岗位等 在新的起点上实现更高水平的发展
积累工作经验
多元化文化交流
专业实操技能
建立人际资源圈Early_History_Of_The_Pipe_Organ
2013-11-13 来源: 类别: 更多范文
Early History Of The Pipe Organ
The king of instruments has a long history, one which can arguably be traced to the concept of
a collection of fixed-pitched pipes blown by a single player (such as the panpipes) (Randel 583).
The first examples of pipe organs with the basic features of today can be traced to the third
century B.C.E. in the Greco-Roman arena; it is said to have been invented by Ktesibios of
Alexander and contained a mechanism to supply air under pressure, a wind-chest to store and
distribute it, keys and valves to admit wind to the pipes, and one or more graded sets of
fixed-pitch pipes. (Randel 583) These early organs used water as a means to supply air-pressure,
hence the use of the terms hydraulic and hydraulis. Hydraulic organs were in use for several
hundred years before the concept of bellows, similar in concept and style to those of a blacksmith,
came into use with the organ. Numerous bellows were used to supply air to the wind-chest, often
being pumped in pairs by men. The disadvantages of this method of air supply include the lack of
consistent pressure, which leads to inconsistent pitch and tuning; also, many people were required
to operate the bellows since there were upwards of twenty-four bellows per organ (Hopkins
organs, organ, one, two, similar, randel, pipes, while, stops, large, influence, builders, played, pedal, larger, century, bellows, being, time, size, sets, rimbault, positive, limited, hopkins, german, design, began, until, style, range, early, churches, church, building, throughout

