Yes, I can definetly tell if I use dithering or not. Without, the files sound less good but after uploading with additional compression you get some hiss. I know the theory behind dithering and compression but the funny thing is that you still have to do some trial an error kind of thing because every codec behaves differntly.
Yes it can require some listening and testing as noise shaping is a bit subjective. Some like , or just get used to, shaped dither like PWR3, others prefer unshaped like TPDF (triangular probability density function), some prefer not to dither at all but just truncate. I tend to use TPDF - but that's a personal preference and it depends on the type of music.
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Anyway we could dicuss that here but it would be great if we could start some more in depth threads to adress these issues. Like this we would attract more people since the title of the threat doesn't refer to the theoretical background
I'm happy if you do.