I doubt it's firewall. I can unplug my USB plantronics cable and plug in a normal USB headset and sound volume and quality is improved 100x, not to mention no cutouts. Put pretty Poly back on and it's dreadful, indeed one customer just said to me "email me as I can't hear a word you're saying".
I need your help and I would like to record sound and voice of a call, originally it can be done from a normal headphones that have stereo input, however when I connect with plantronics headphones that have USB input, when recording a call only record my voice and not the audio of the other person with whom I speak.
Please what settings should I do to work properly from my plantronics hearing aids?