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minyves
Asked: 2022-03-26 00:32:21 +0800 CST

Audio crackling after update in USB sound card

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With two USB sound cards (presonus audiobox and behringer xenyx q802) I have crackling sound after the kernel was updated to 5.13.0-37. Tried on three different machines with Ubuntu 20.04 and 21.10. Audio output from onboard audio is ok. Output from USB sound card has irregular peaks (faster than every second).

I found this:

Upgrading to 5.13.0-37-generic breaks audio with external audio card

which is very interesting, but doesn't tell what to do to get it working again. I have no older kernels I could revert to. Any suggestions?

I mean, these were updates also for a LTS version that are not supposed to break a working system?

sound

2 Answers

  1. In /etc/pulse/daemon.conf you should have a line like this

     ; default-sample-rate = 44100

    edit the file with sudo nano /etc/pulse/daemon.conf (don't forget to remove the ; as it comments the line) to

    default-sample-rate = 48000

    save the file using Ctrl+X then Yes and press Enter

    afterwards run

    systemctl --user restart pulseaudio.service

    Audio should work now.

    You can find older kernel versions from the grub menu under Advanced options for Ubuntu

    enter image description here

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  2. Best Answer

    If you don't have any older kernel, just install one using

    sudo apt install linux-image-5.13.0-35-generic

    (the 5.13.0-35 works for me). It seems that next upgrade 5.13.0-41 is a fix.

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