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by robinhood 1494 days ago
I have this MBP too and I experience this crackling noise too, only when watching a video though. And I never, ever use a ton of CPU, so I doubt this is caused by the CPU having a high usage. First time it happened, I was scared as I thought I broke something, but now I kinda got used to it, unfortunately.
1 comments

While it seems to only be a temporary fix, the steps in this comment have fixed it for me so far: https://reddit.com/r/macbookpro/comments/qmpg3k/_/hw9zmgm/