the quality of a piece of music that depends on the key in which it is written 调性 The piece then shifts in tonality, setting a more hopeful mood. 然后乐曲的音调发生变化，使心情更加充满希望。 His music exhibits great originality and harmonic interest without abandoning the principles of tonality. 他的音乐表现出极大的原创性和和声趣味，却没有放弃音调原理。