Ambisonics is a 手段(意味着) of 录音 whereby a single 通道 is 编码 into four 独立 可控制 输出 通道 空间 orientation during 回放 is 创作 through the 交互 and complementary 行为 of a variably sized group of 扬声器 扬声器 during 声重发系统 回放 tend to 不 be 感知（认为） as point 源 and ambisonics is seen by some as an 有效 手段(意味着) of 避免 the 问题 of diffused 立体声 表演 practice in 特殊 the 损失 of 空间 控制 when a 听众 is situated too far from the 立体声 'sweet spot'