Well, I'll take the measurements again, there was no difference last time, when I made similar measurements.Would be nice to compare RMAA of audio output with unmodified and modified supply.
Since these differences relate to visualization, alas, I do not know what measurements should be taken to quantify them. J-test is possible, but I do not know how to do it ;((Most will absolutely believe you hear those differences. Most (here at least) will also understand that without controls people hear all kinds of things.