Incredible that you “still love it”. I would have send the f*cker back in a heartbeat. Obviously the seller messed with the tablet or it wasn’t a new one to begin with. Try to return it and buy another (new) one from a trusted seller. I’ve bought mine 2 weeks ago (gearbest) and have none of the problems described above. Maybe try a new clean install to solve your problems if you’re unable or don’t want to return it. Here’s a link with everything you need to make it work perfect. At least that’s how it worked out for me. Goodluck.
Integrated onboard soundcard. Check your bios for details. Go to bios, advanced settings, chipset, southbridge control, audio. Just look don’t change unless you know what you’re doing.