24.Piano
The ancestry of the piano can be traced to the early keyboard instruments of the fifteenth and sixteenth centuries --- the spinet, the dulcimer, and the virginal. In the seventeenth century the organ, the clavichord, and the harpsichord became the chief instruments of the keyboard group, a supremacy they maintained until the piano supplanted them at the end of the eighteenth century. The clavichords tone was metallic and never powerful; nevertheless, because of the variety of tone possible to it, many composers found the clavichord a sympathetic instrument for intimate chamber music. The harpsichord with its bright, vigorous tone was the favorite instrument for supporting the bass of the small orchestra of the period and for concert use, but the character of the tone could not be varied save by mechanical or structural devices.
The piano was perfected in the early eighteenth century by a harpsichord maker in Italy . This instrument was called a piano e forte , to indicate its dynamic versatility; its strings were struck by a recoiling hammer with a felt-padded head. The wires were much heavier in the earlier instruments. A series of mechanical improvements continuing well into the nineteenth century, including the introduction of pedals to sustain tone or to soften it, the perfection of a metal frame, and steel wire of the finest quality, finally produced an instrument capable of myriad tonal effects from the most delicate harmonies to an almost orchestral fullness of sound, from a liquid, singing tone to a sharp, percussive brilliance.
上一篇: 2012考研阅读资料经典美文45
下一篇: 2012考研阅读资料经典美文47
人教(新版)英语五上《Unit 4 What does your mother do》(Lesson22)flash课件
人教新版英语五上《Lesson7》PPT课件
人教新版英语五上《Lesson5》PPT课件
人教(新版)英语五上《Unit 5 Is this your schoolbag》课件包(含声音素材)之二
人教(新版)英语五上《Unit 4 What does your mother do》(Lesson21)flash课件之一
人教新版英语五上《Unit 1 Lesson 6》PPT课件2
人教(新版)英语五上《Unit 3 My father is a teacher》(三)ppt课件包(含声音素材)
人教新版英语五上《lesson11》PPT课件
人教(新版)英语五上《Unit 5 Is this your schoolbag》(Lesson 27)课件包(含声音素材)
人教(新版)英语五上《Unit 5 Is this your schoolbag》(Lesson28)flash课件
人教(新版)英语五上《Unit 5 Is this your schoolbag》(第二十五课)课件包(含声音素材)
人教(新版)英语五上《Unit 5 Is this your schoolbag》(Lesson 26)课件包(含声音素材)
人教(新版)英语五上《Unit 5 Is this your schoolbag》课件包(含声音素材)之三
人教(新版)英语五上《Unit 4 What does your mother do》(Lesson19)flash课件之一
人教(新版)英语五上《Unit 5 Is this your schoolbag》(Lesson29)flash课件
人教(新版)英语五上《Unit 5 Is this your schoolbag》(Revisoin)课件包(含声音素材)
人教(新版)英语五上《Unit 4 What does your mother do》(Lesson21)flash课件
人教(新版)英语五上《Unit 3 My father is a teacher》(Lesson 18)ppt课件包(含声音素材)
人教(新版)英语五上《Unit 3 My father is a teacher》(Lesson 17)ppt课件包(含声音素材)
人教(新版)英语五上《Unit 4 What does your mother do》(Lesson20)flash课件
人教新版英语五上《Fun Time 1》PPT课件1
人教(新版)英语五上《Unit 6 whose T-shirt is that》(Lesson31)flash课件之一
人教(新版)英语五上《Unit 5 Is this your schoolbag》(Lesson 30)课件包(含声音素材)
2014秋人教版(精通)英语五上《Unit 1 We have new friends》ppt课件1
人教新版英语五上 英语歌曲 课件
人教(新版)英语五上《Unit 5 Is this your schoolbag》(Lesson27)flash课件之一
人教(新版)英语五上《Unit 4 What does your mother do》(Lesson23)flash课件
人教(新版)英语五上《Unit 6 whose T-shirt is that》(Lesson33)flash课件
人教(新版)英语五上《Unit 6 whose T-shirt is that》(lesson31)课件包(含声音素材)
人教(新版)英语五上《Unit 5 Is this your schoolbag》(Lesson29)flash课件之一