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I am using Adafruit I2S MEMS Microphone in Raspberry Pi 4 running raspbian buster. I installed it successfully following adafruit guide. It is working well for recording using arecord.

However, every time I start a recording it starts with a "pop" sound. Here is how the waveform looks like:

enter image description here

If you have any suggestion or if you already encounter this issue, I would really appreciate your help.

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