Webcam integrated microphone produces noise

[Erik Nijenhuis]

Technical information:
Description: Ubuntu 20.04.3 LTS
Release: 20.04

Recently I bought a "Jieli Technology USB PHY 2.0" which is a cheap webcam with an integrated microphone. The webcam behaves just fine, where the microphone outputs noise.

Looking at dmesg, the log is spammed with:
[ 3657.927446] xhci_hcd 0000:00:14.0: WARN: buffer overrun event for slot 4 ep 4 on endpoint

I've applied [this patch](https://mailman.alsa-project.org/pipermail/alsa-devel/2020-December/178361.html) manually on linux-source-5.4.0.tar.bz2 to see if the microphone works after that.
Unfortunately the microphone wasn't detected by pulseaudio and I've tried tuning values with guvcview, but to no avail.

I'm about to test another patch for this issue.
https://www.spinics.net/lists/alsa-devel/msg132769.html

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.11.0-43-generic 5.11.0-43.47~20.04.2
ProcVersionSignature: Ubuntu 5.11.0-43.47~20.04.2-generic 5.11.22
Uname: Linux 5.11.0-43-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: GNOME
Date: Sat Dec 18 14:58:51 2021
InstallationDate: Installed on 2020-08-07 (498 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: linux-signed-hwe-5.11
UpgradeStatus: No upgrade log present (probably fresh install)

[Erik Nijenhuis (maclotsen)]

After applying the patch on ubuntu-focal hwe-5.11, the microphone was found, and was producing sound.
Though, the quality is like I'm sitting in the bathroom.
I have no clue on how it sounds on a Windows PC, so I really have no clue what quality to expect.
I fear that there's nothing to do about it, since I've bought it for €10,-.