Live TV stuttering and sync issues

I have a Hauppauge HVR-1250. Currently on a Pentium 4 3.06Ghz machine Kodi 17 rc4 on Windows 7 32bit.

I am in the USA, ClearQAM and OTA ATSC

I have had similar results on Windows 10 and Ubuntu 14.04 LTS.

Similar results whether I’m using NextPVR, SWMC, or TVheadend.

Similar results whether the receiver is on the same machine as Kodi or on another. They are currently on the same machine. I do have 2 tuners on another Windows 10 machine using NextPVR They stutter in Kodi also.

Similar results on earlier versions of Kodi back to 15, when live TV began.

When I watch Live TV on WinTV7 or WinTV8, WMC, NextPVR or TVheadend no stuttering or buffering or sound sync problems.

When I watch Live TV on Kodi the images look like “computer” videos (runners seem to be dragging their toes on each step) and the sound is just a bit out of sync with buffering. With any of the PVR addons.

With NextPVR I tried all of the filters.

I am getting tired of changing computers and OSs. I seem to be the only one with the problem. Are there any adjustments to Kodi that I’m missing?