This is the most ridiculous headset issue I’ve ever had: with a brand new USB headset from Logitech, model 960, after some month of normal operation a problem appeared such that one can no longer hear voice, but it was OK to hear music. Yes! One could hear music but generally without hearing any voice!!!
The issue was verified with different software (web browsers, Skype, MS Teams, etc.) on different computers, with Linux and with Windows. Unconditionally: fine with music, but no voice!
As having education with some electronics I’ve started to believe a sound amplifier built into the headset got broken and stopped amplifying some part of the bandwidth. Exotic, right?
The solution was as simple (and ridiculous!) as just changing left-right balance from the default, neutral position.
All credits should go to the author of the “How To – Fix the Sound on the Logitech USB Headset!” video (published in 2016!), which is presenting how to fix this issue under MS Windows (setting one channel, left or right, to 0% and the other one to 100%).
Under Linux this usually looks different – you need to change the left/right balance slider to a position other than the center using a sound control panel like mate-volume-control:
Actually I recommend setting the slider position somewhere near the center. After this simple step the headset started to work as expected! Voice is back. One can hear music as well. I believe Logitech is to blame.
This is published in “Linux” category but the issue itself was present on Windows as well.