Originally Posted by skvalex
Please take a log in Settings > Three dots > Debug. Then send it to me ([email protected])
Upon further testing, I got it to work now.
Apparently ROOT method of recording doesn't work at all, doesn't even save any recording files.
So I tried the Standard API method, in the beginning it doesn't work at all as well. It saves the recording files, but noted that it was saved under the OPUS format. I then tweaked the settings to change it to AMR/WAV file formatting, and wala it works now.
Now recording is clear and perfect. Probably because there is still no device profile yet for Mi 9T Pro / Redmi K20 Pro.
Thank you sir, sorry for the inconvenience.
Do let me know if you still need the logs, I can send them over no problem.