I am also affected by sound crackling and sometime distortion since i swapped motherboard for an ASUS X470 prime pro. It is present permanently on microphone but sometimes affects other sources and applications. The workaround above in the comments did not fix it for me.
4.15.0-29-generic Description: Ubuntu 18.04.1 LTS -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1716654 Title: [System Product Name, Realtek ALC1220, Pink Mic, Rear] Underruns, dropouts or crackling sound Status in alsa-driver package in Ubuntu: Confirmed Bug description: Have checked under windows (same computer in dual-boot & same headset), and the sound is crystal clear, so 99% sure this is not a hardware problem. Motherboard is ASUS Crosshair Hero 6. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 4.12.0-13.14-generic 4.12.10 Uname: Linux 4.12.0-13-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC3: paul 2587 F.... pulseaudio /dev/snd/controlC0: paul 2587 F.... pulseaudio /dev/snd/controlC1: paul 2587 F.... pulseaudio /dev/snd/controlC2: paul 2587 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Tue Sep 12 11:48:05 2017 PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaRecordingTest: ALSA recording test through plughw:Generic successful Symptom_Card: HD-Audio Generic - HD-Audio Generic Symptom_Jack: Pink Mic, Rear Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:Generic successful Symptom_Type: Underruns, dropouts, or "crackling" sound Title: [System Product Name, Realtek ALC1220, Pink Mic, Rear] Underruns, dropouts or crackling sound UpgradeStatus: Upgraded to artful on 2017-08-31 (11 days ago) dmi.bios.date: 07/28/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1501 dmi.board.asset.tag: Default string dmi.board.name: CROSSHAIR VI HERO dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1501:bd07/28/2017:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnCROSSHAIRVIHERO:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: To be filled by O.E.M. dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer mtime.conffile..etc.modprobe.d.alsa-base.conf: 2017-09-12T11:37:48.670242 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1716654/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
