Originally Posted by
dave2010
That sounds like an interesting demo, if you can find the link, or the file.
If I understand you correctly about this example, there is a section of dither+signal - which sounds amazing. Then a section of dither alone - which is very obviously audible and not good.
For a comparison it would be useful to have the first section without the dither - to hear if that also sounds amazing.
If all this does hold up, as you suggest, then it would make sense for recordings to have the dither adjusted in some way to the volume of the wanted signal - to give the "amazing" effects where that would be most wanted/desirable.
I wonder if this shows a physical/psychological effect in human hearing similar in some ways to visual optical illusions, which demonstrate the odd way in which our brains/visual systems actually interpret the world.