是的, 从引脚看, LLINEIN, RLINEIN, Nominal 0-dB input level is 1 VRMS; MICIN Buffered amplifier input suitable for use with electret-microphone capsules. Without external resistors a default gain of 5 is provided.
手册上是有个输入典型值 1Vrms (LLINEIN, RLINEIN). 是不是就是代表信号的峰值不能超过1V呢? 不是的, 因为这是有效值, 按照 √2 的关系, 峰峰值应该是 2.83V
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