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.
冲刺1四级写作的高分:经典句型(3)
四级考试作文的预测:第2篇
四级考试作文的预测:第27篇
四级考试作文的预测:第26篇
四级考试作文的预测:第16篇
四级考试作文的预测:第13篇
四级考试作文的预测:第20篇
四级考试作文的预测:第28篇
四级复习资料的大全:写作(31)
英语四级考试写作的备考评分原则
四级考试作文的预测:第5篇
四级复习资料的大全:写作(49)
四级复习资料的大全:写作(48)
四级考试作文的预测:第23篇
四级考试作文的预测:第30篇
四级考试作文的预测:第19篇
冲刺四级写作的高分:经典句型(1)
四级考试作文的预测:第21篇
四级考试作文的预测:第6篇
四级考试作文的预测:第11篇
四级复习资料的大全:写作(36)
四级考试作文的预测:第18篇
四级复习资料的大全:写作(50)
四级复习资料的大全:写作(21)
四级考试作文的预测:第17篇
四级考试作文的预测:第15篇
四级复习资料的大全:写作(35)
四级考试作文的预测:第3篇
四级复习资料的大全:写作(44)
冲刺四级写作的高分:经典句型(2)
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |