A 作曲 approach in which different 声 质地（纹理、织体） are placed alongside one another It allows the 听众 to compare and 对比 one 声 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 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