Created attachment 279301 [details]
I always got this issue only on Linux, every distro I tried including Manjaro Linux, Debian, ubuntu had this problem.
Basically the microphone input sounds always distorted and "robotic" even on high pitch. In all the programs I tried.
Workarounds as listed on the ArchWiki ---> https://wiki.archlinux.org/index.php/PulseAudio/Troubleshooting#Microphone_crackling_with_Realtek_ALC892 have not changed anything.
Interesting thing though is that on FreeBSD this does not happen.
alsa-info on the attachments
Kernel version: Linux luky-MS-7A37 4.18.0-10-generic #11-Ubuntu SMP
Driver version: k4.18.0-10-generic
Library version: 1.1.6
Utilities version: 1.1.6
Obviously this also happens on other kernels.
Created attachment 279675 [details]
Recording showing the noise
I may confirm that recording without pulseaudio using ffmpeg -alsa produces the same disturbed sound
Motherboard model is an MSI B350M AM4 for Ryzen CPU's
There are other people having the same issue on the same motherboard model
A partial workaround which doesn't completely fix the issue but improves things is the following:
Adding to /etc/pulse/default.pa, use_ucm=0 tsched=0 right after module-udev-detect
resample-method = src-sinc-best-quality
default-sample-format = s16le
default-sample-rate = 48000
Don't know which what specific parameter improved this, because when I test each one of those singularly doesn't totally fix the problem.
The best results I can obtain are with all those combined
Actually this workaround adds another problem, in games the sound is delayed...
I have the same problem with MSI B450 Tomahawk Motherboard