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.
人教版PEP英语三上2012版recycle1
[2012版]人教版(PEP)三上《Unit 1 Hello》(Lets learn 1)flash课件
[2012版]人教版(PEP)三上《Unit 1 Hello》(Lets talk 1)flash课件
[2012版]人教版(PEP)三上《recycle 2》(第3课时)ppt课件
人教PEP版英语三上《Unit 3 Let’s paint》lesson 16 flash课件
[2012版]人教版(PEP)三上《Recycle 2》ppt课件
[2012版]人教版(PEP)三上《recycle 2》(第2课时)ppt课件
人教版PEP英语三上2012版Unit 1
[2012版]人教版(PEP)三上《Unit 1 Hello》(Main)flash课件
人教版PEP英语三上2012版Unit 2
[2012版]人教版(PEP)三上《recycle 2》(Period 3)ppt课件
人教PEP版英语三上《Unit 5 Let’s eat》lesson 29 flash课件
[2012版]人教版(PEP)三上《Unit 1 Hello》(Lets learn 2)flash课件
[2012版]人教版(PEP)三上《Unit 1 Hello》(Lets check)flash课件
人教版PEP英语三上2012版recycle2
人教版PEP英语三上2012版wordlist
人教版PEP英语三上2012版Unit 5
人教PEP版英语三上《Unit 4 we love animals》 chant and draw flash课件
人教PEP版英语三上《Unit 3 Let’s paint》课件包(5文件)
人教PEP版英语三上《Unit 5 Let’s eat》lesson 27 flash课件
[2012版]人教版(PEP)三上《Recycle2》flash课文点读课件
人教版PEP英语三上2012版useful
人教PEP版英语三上《Recycle2》PPT课件
[2012版]人教版(PEP)三上《recycle 2》(Period 2)ppt课件
[2012版]人教版(PEP)三上《recycle 1》(第3课时)ppt课件
人教PEP版英语三上《Recycle1》PPT课件之二
[2012版]人教版(PEP)三上《Recycle 2》(Read aloud)flash课件
[2012版]人教版(PEP)三上《Recycle 2》(Sing a song)flash课件
人教版PEP英语三上2012版Unit 3
人教PEP版英语三上《Unit 5 Let’s eat》lesson 25 flash课件
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |