I have this issue too. Hardware is a different external USB DAC (not Focusrite):
$ lsusb | grep DAC Bus 005 Device 004: ID 08bb:2704 Texas Instruments PCM2704 16-bit stereo audio DAC Symptoms: Clicking sounds. Irregular but pretty frequent, up to once a second. It happens on kernel 5.13.0-37, but it goes away if I revert to 5.13.0-35. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.13 in Ubuntu. https://bugs.launchpad.net/bugs/1966066 Title: audio from external sound card is distorted Status in linux-signed-hwe-5.13 package in Ubuntu: Confirmed Bug description: The sound card is a Focusrite Scarlett 2i2. The sound is distorted everywhere. Sound via HDMI works. Seen others having the same problem: (Edit because of previously wrong link here) https://askubuntu.com/questions/1398614/upgrading-to-5-13-0-37-generic-breaks-audio-with-external-audio-card ubuntu release: Ubuntu 20.04.4 LTS package name involved in bug: linux-image-5.13.0-37-generic ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.13.0-37-generic 5.13.0-37.42~20.04.1 ProcVersionSignature: Ubuntu 5.13.0-35.40~20.04.1-generic 5.13.19 Uname: Linux 5.13.0-35-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.21 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Wed Mar 23 12:56:02 2022 InstallationDate: Installed on 2020-12-18 (459 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) SourcePackage: linux-signed-hwe-5.13 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.13/+bug/1966066/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
