//-------------------------------------------------------------------- var bookTitle = '15首巴赫三部创意曲集'; var bookSubTitle = ''; var bookFootText = '中国曲谱网 www.qupu123.com'; var bookIntroduce = "

  巴赫《三部创意曲》是指三个声部自由对位的复调器乐短曲,是在《二部创意曲》的基础之上完成的。它同样采用了在四升四降之内的大小调,并省略了在当时极少使用的几个调。《三部创意曲》共分为15首。学习《三部创意曲》,应寻找它与《二部创意曲》之间的异同。

  主题是创意曲的核心所在。运用主体思维明确创患曲的创作思路,并将其贯穿到乐曲的演奏之中。这是《二部创意曲》与《三部创意曲》的共性所在。但是这二者在保持共性的基础上也存在着差异。

  《三部创意曲》的德文为Sinfornien,意即交响曲。这对立体式思维训练、双手的协调能力、各个手指的独立性以及多声部的听辨能力提出了更高的要求。在《三部创意曲》的教与学中应突出以下儿点:   

  第一,充分保持长音符的时值:  

   在三部创意曲中,要用两只手去演奏三个声部。那么,在大多数情况下,一只手需要同时弹出两个声部来。这两个声部的律动又常常不是同时进行的,各个声部有自己的呼吸与分句。巴赫在乐曲中大量使用了长音符的延续来帮助创作。而长音符并不是孤立的,而是与同一声部的前后发展形成一个统一的整体。演奏中,我们应充分保持长音符的时值,这能使手指的独立控制能力得到了较大的锻炼。

   第二,音色设计:  

   顾名思义,三部创意曲是三条旋律线交织起来的音乐,包含了三个声部的进行。演奏中应强调运用立体式思维方式,对每一个声部进行音色设计,并以灵敏的手指细致地触键,使“每个声部都充满旋律的生命”(戈登威捷尔语)。丰富的音色层次由多样化的触键体现,更依赖于内心对每一个音和其他声音结合的感应。使三个声部既独立存在,又互相交融,形成一个立体交响的统一整体。

   第三,指法问题:  

  三声部创意曲中,当一只手弹奏两个卢部时,某些连奏的段落常常带来运指的困难,须用较复杂的指法:倒指(或称垫指)、滑指、无声换指,要求灵活的腕部和灵敏的指尖触感。注意:当一个手指未被下一指取代前,不能离开按着的琴键。

  第四,三部创意曲的练习步骤:  为理解复调音乐的整体和各细节的发展脉络,处理好声部的纵横关系,应首先按(高)、(低)、(中)顺序单独练习每个声部:然后两个声部组合练习,并倾听它们结合的音响;当三个卢部一起弹奏时,先分别唱(或倾听)每一声部,再倾听三声部结合的音响,寻找完美平衡。

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