My TV has digital TV and Analog TV so was made before the switch over, it was bran new when I bought it from Argos, so its not a smart TV but it is a HD Widescreen TV 42 inch, it was £300 then, it could of been 2008/9 when I bought it, not sure.
My USB Capture Card is a Chinses £15 one, it works with 10 minis OK (PS Classic, Mega Drive Mini 1 and 2, SNES Mini, THEA500 Mini, THEC64 Mini, THE400 Mini, Atari2600 Plus and Atari Gamestation Pro) there is only one other machine that had this kind of problem, the CHA - Capcom Home Arcade, its board inside it was called the OPI because it had the same specs as the Orange PI PC H3 so could be a OPI thing but uses the same board as THEC64 but has a different nand, it has a mmc instead and 512 ram but does have wifi on board so could be the wifi, I am using it on the A600 GS ATM, maybe its causing the audio shuddering.
Its this one...
https://www.youtube.com/watch?v=x40-z7rFmWQIt has a HDMI loop on it so a HDMI output port too so you can connect it to the PC and see it on another TV at the same time.