Indeed, and it sounds similar to what you get using it for calls hands free.
If you talk loud and clear as you would at a (physical) meeting, it works fine.
But if you talk in a normal voice, the other end complains that they can not hear what you are saying....
It has -unfortunatly- been a known issue since 'day 1' on stock, and I have long given up hoping for a fix and use it with a headset, as I seldom do voice calls.
I fear this 'filter' is deep down, either hardware or software in the driver, as I assume they would have fixed it quickly if it was in software they could ac