A 技能 基于 on a 单元 often 已有 on 合成器 which allows for a 周期 'capture' of a 频率 along a 动态 波形 which is held until the next 'sample' is taken When the 波形 that is followed is at a 低 频率 predictable melodic 模式 are evolved whereas a 较高 频率 will 通常 产生 随机性 模式