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I have a 2021 m1 mbp... I keep it plugged into external speakers, and at random moments (like just now it happened twice within a 10 minute period) it will just output horrific loud garbage noise for 1/4 a second and then stop. Has anyone else experienced this?

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  • How do you have your speakers connected? Analog 1/8" connection? Digital optical connection? HDMI? Are they connected via an amplifier?
    – agarza
    May 6 at 16:07
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    If they have a built-in power amp, then you're hearing the Mac's internal amps shut down at power-loss, making random power-spikes. You will have to mitigate this at the amp. [I have pro studio speakers here with 400w of power, 2ft from my head… you learn pretty quickly to never let the Mac sleep or reboot when they're switched on. It's like being kicked in the face by a rhino in big studded boots ;)
    – Tetsujin
    May 6 at 16:24
  • It could just be loose wiring on the cables, of course.
    – benwiggy
    May 6 at 18:02
  • @benwiggy umm.. no.
    – patrick
    May 6 at 18:27
  • @agarza yes, 1/8" wire directly to an amp.
    – patrick
    May 6 at 18:27

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It seems that there is an issue with the 2021 M1 MacBook Pro having audio problems. An article on 9to5Mac.com mentions "multiple complaints" on the Apple Communicty forum and Reddit.

The article does happen to mention a possible solution:

A Reddit user corroborated this theory by saying that the problems can be temporarily fixed after killing the macOS process “coreaudiod” by going to the Activity Monitor app. Some users claim that the issues disappeared after installing macOS 12.3, but other users are still experiencing crackling speakers.

In the comments for the article, several users have mentioned other solutions that worked for them, but they are different for each person.

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