[Satellite L300, Realtek ALC268, Mic, Internal] Sound is distorted

[PetarGeorgievDemirev]

Hi My internal mic does not work properly

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.3.0-46.38~18.04.1-generic 5.3.18
Uname: Linux 5.3.0-46-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: petardemirev 1217 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 11 21:28:21 2020
InstallationDate: Installed on 2020-02-16 (55 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:Intel failed
Symptom_Card: Вграден звук - HDA Intel
Symptom_Jack: Mic, Internal
Symptom_Type: Digital clip or distortion, or "overdriven" sound
Title: [Satellite L300, Realtek ALC268, Mic, Internal] Sound is distorted
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/09/2008
dmi.bios.vendor: INSYDE
dmi.bios.version: 1.50
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvr1.50:bd12/09/2008:svnTOSHIBA:pnSatelliteL300:pvrPSLBGE-00T009G3:rvnTOSHIBA:rnPortablePC:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.family: Intel_Mobile
dmi.product.name: Satellite L300
dmi.product.sku: Montevina_Fab
dmi.product.version: PSLBGE-00T009G3
dmi.sys.vendor: TOSHIBA