A 作曲 approach in which different 声音 质地(纹理、织体) are placed alongside one another It allows the 听众 to compare and 对比 one 声音 质地(纹理、织体) against another and for the 作曲家 to populate the 频谱 空间 with a 多样性(差异) of 声音 能量 The 数 of different layers will 影响 the 频谱 密度 with a great many layers 创作 a microtonal cluster