Just got the USB TV tuner the other week and am having some issues where some channels start stuttering the audio a short time after they are switched to. Pausing fixes it for a few seconds then it happens again. Video seems to be fine. Will try and post a video if that helps in case it doesn't make sense.
The signal is 90-100% on all channels when checked on my TV, and all channels work flawlessly on that. The Xbox is connected to the same antenna outlet as the TV.
Also there is an issue where the video glitches/skips for a second every now and then. Happens on all channels. Sound doesn't seem to be affected.