As someone that also works with feedback something to think about is the added delay that higher resolution devices add to the signal. I do most of my feedback with a old tub camera and a CRT monitor and while the resolution is SD some things it does are unobtainable with newer hirer resolution cameras do to the lag/delay time added but each digital thing in the system. thus is an example of some all analog feedback.
I am not saying this is better or anything like that and this was filmed with a HD camera that was not attached to the feedback line. I think its an example tho of more resolution doesn’t mean better feedback. Digital also has its own benifits of a longer delay between what is seen on the screen and then coming back to it. its own ascetic as well.
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