Audio corrupts(electronic noise) sometimes

[qqq89513]

It sounds the same in #3. But when it occurs, it last shorter than it does in #3.
It happens with random time gap, sometimes 3 minutes, sometimes 10 minutes.
This also happens in DiscoveryF7Audio, but it has a longer gap between 2 occurrences. In otherwords, you are less likely to hear the bad sound from DiscoveryF7Audio.

Note that color adjustment has no relation to this issue.
The electronic noise comes out at around 5 second in the video below.

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