To explain the problem
Background sound comes louder (fuzzy) on songs I nearly can't hear singer and sound cracks
This is only happens with headphones, speaker is fine.
My headphones is not the problem I tried with another headphones and sound is same

I have dual boot with windows 10 and windows sound is fine
i reinstalled kde neon 3 times and didn't fix the issue. Even live usb has the same problem

Operating System: KDE neon 5.19
KDE Plasma Version: 5.19.4
KDE Frameworks Version: 5.73.0
Qt Version: 5.14.2
Kernel Version: 5.4.0-42-generic
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-5200U CPU @ 2.20GHz
Memory: 7,7 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 5500

I think i fixed it

open pulseaudio and do this


i'm hearing from both left and right for some reason and i don't know how to make it stereo

İ installed two games called "Teeworlds" and "Armagetron Advanced"
somehow it fixed to issue