乐队在正式演奏之前,所有的弦乐器都要对弦校音,常常是由清晰准确的双簧管奏出一个A音来,大家依此为标准来为自己的乐器校正弦音,越准越好。但是,为了某种特殊效果的需要,将琴弦音故意调错的事例也是有的。如舒曼的钢琴四重奏,将大提琴的C弦(最低音的弦)故意调低小二度,成为B音,造成一种奇特的效果。瓦格纳的歌剧《莱茵的黄金》,乐队为 Before the band performs all of the stringed instruments must be chord-tuned, often with an A-sound from a clear and accurate oboe, and everyone will be able to calibrate the chord for their own instrument as far as the standard is concerned. However, in order to meet the needs of a special effect, there is also a case of intentionally tuning the strings. Such as Schumann’s piano quartet, the cello C string (the tunes of the lowest) deliberately lowered by two degrees, as a B sound, causing a peculiar effect. Wagner’s opera “Rhine’s Gold”, the band is