try record stereo instead of mono using audacity and check whether left and right channel out of phase,
try mute one channel using alsa mixer or hda analyzer -- 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/1417789 Title: [W740SU, VIA VT1802, Mic, Internal] mostly no sound at al Status in alsa-driver package in Ubuntu: New Bug description: Mostly I get no sound at all when using the internal mic. Using sound setting recording level slider I am able to get some (noisy sound). With alsamixer I can get (also noisy) recordings by lowering "Internal Mic Boost" I have applied (and removed) oem-audio-hda-daily-dkms_0.201502011331~ubuntu14.10.1_all.deb options snd-hda-intel position_fix=1 options snd-hda-intel position_fix=2 to no avail ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: alsa-base 1.0.25+dfsg-0ubuntu4 ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2 Uname: Linux 3.16.0-29-generic x86_64 ApportVersion: 2.14.7-0ubuntu8.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC1D0c: kaa 2423 F...m pulseaudio /dev/snd/controlC1: kaa 2423 F.... pulseaudio /dev/snd/controlC0: kaa 2423 F.... pulseaudio CurrentDesktop: Unity Date: Tue Feb 3 23:05:33 2015 InstallationDate: Installed on 2014-02-25 (342 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_Jack: Mic, Internal Symptom_Type: Sound works for a while, then breaks Title: [W740SU, VIA VT1802, Mic, Internal] fails after a while UpgradeStatus: Upgraded to utopic on 2014-12-05 (60 days ago) dmi.bios.date: 10/02/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: Tag 12345 dmi.board.name: W740SU dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd10/02/2013:svnNotebook:pnW740SU:pvrNotApplicable:rvnNotebook:rnW740SU:rvrNotApplicable:cvnNotebook:ct9:cvrN/A: dmi.product.name: W740SU dmi.product.version: Not Applicable dmi.sys.vendor: Notebook mtime.conffile..etc.modprobe.d.alsa.base.conf: 2015-02-03T22:20:52.949815 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1417789/+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
