I am using rpi4b with raspbian dated dec 2020 and seeed respeaker mic hat 2 and notice there is an abrupt start followed by some silence to the audio.

Here is a sample with a simple test arecord -D plughw:1,0 -f S16_LE -r16000 file.wav


I have tried applying some filters using ladspa (delay and fadein) and other alsa configurations without success.

Does anyone have any ideas on how to fix this?


You should use the Raspberry Pi OS 2021-01-11. As stated in the Release notes there are some important bug fixes belonging to audio.

  • not quite, still shows, here are two tests image.png
    – gSaenz
    Jan 17 at 13:47

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