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Ogni Author

Level 1

10 points

Macbook Air M1 garbled audio via USB-C

The audio from the internal speakers is always fine. But sometimes audio through the USB-C connection to a set of external speakers becomes completely garbled.

I've confirmed that the speakers are fine, and the USB-C cord is fine. This issue is definitely an audio-out issue.

This issue appears only after the laptop has gone to sleep, without a full reboot, several times. Only thereafter, when plugging into the USB-C connection, does the audio suddenly get wonky.

If it helps, corresponding video also gets crazily jerky. It's like the entire playback mechanism (whether only audio or audio+video) is completely wrecked.

Youtube Videos gets fast forwarded the same time.

Restarting the machine fixes the problem.

Someone else posted about such a problem for a Macbook Pro in 2022 already but did not get a response

Any ideas???

M70AE,

Posted on Feb 9, 2023 1:39 PM

Top-ranking reply

chuckbl

Community Specialist

Posted on Feb 12, 2023 7:16 AM

Hello Ogni,

Let's use the steps below to boot your Mac into safe mode to see if that behavior persists from there:

1. Shut down your Mac.

2. Turn on your Mac and continue to press and hold the power button until you see the startup options window.

3. Select your startup disk, then press and hold the Shift key while clicking “Continue in Safe Mode.”

4. Log in to your Mac. You might be asked to log in again.

You can also find those steps in this resource: How to use safe mode on your Mac - Apple Support

It can take a few extra minutes to boot into safe mode. Your screen may flash or flicker while in safe mode. Those behaviors are expected. Testing in safe mode runs a check on your disk, removes some cached files, and can help isolate conflicts with startup items. Once you've tested that behavior in safe mode, you can restart to leave safe mode.

Should that still persist, did you test with another cable or USB-C audio device as part of your prior troubleshooting?

Let us know, and we'll keep moving forward from there.

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Macbook Air M1 garbled audio via USB-C

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