Thanks for your quick reply. The problem, yes, can be reproduced in every long-time run, perhaps 1 or 2 time out of 100 times recording. I linked a wav file here: http://120.25.201.118/lotus/files/espbin/1304.wav.

with some corrupted .wav diagrams.

the diagram of L channel data corrupted the diagram of R channel data corrupted the diagram of zoom-in detail data corrupted

Hi, I am testing with a LyraT 4.3 board, and running example pipeline_wav_sdcard . Firstly the origin example was running great and record one .wav file each time I ran it. Then I wrapped it to record repeatedly with an increasing number as .wav filename. Something strange was discovered that with a...