The ratio of the input frequency to the output frequency of the signal is the same as the ratio of the recording sampling rate to the playback sampling rate.
信号的输出频率与输入频率的比值，和播放采样率与纪录采样率是一样的。
The ratio of the input frequency to the output frequency of the signal is the same as the ratio of the recording sampling rate to the playback sampling rate.
信号的输出频率与输入频率的比值，和播放采样率与纪录采样率是一样的。
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