My father is red-green color blind. And frankly speaking, until he told me, I never noticed that. And he even got a driver's license in the old days (I mean 198X).
While I'm lucky enough to have full color vision, I find myself can't imagine how color blind see the world. Sometimes I wondering if I'm color blind but just don't know that. (Several tests on the internet said I'm perfectly fine)
The thing is, how I can tell I'm color blind if I don't know what color I don't know? When talking about the flavor, I found my father and I are not sensitive to the taste of sour, while my mother is. For the same dishes, my mother thinks it is unacceptable sour, while my father and I think it's not sour enough. If I can't taste the sourness at all, how do I know I have that defect?
I'd rather not think this deep hole of a thing of philosophy. I guess it's a philosophy thing. Surely it's not literature.
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MegaLag's video about color blind glasses
https://www.youtube.com/watch?v=Ppobi8VhWwo
https://www.youtube.com/watch?v=_QQtOv2PlOE
Talking about that, I once read a passage said birds can see RGB along with UV. Their world is much more colorful than humans.
I wonder what that means to me. The RGB vision I have is colorful enough for me, I don't know if my brain can handle those extra color space.
Also, unlike scifi, human brains can imagin something like space travel or time travel, I noticed that my brain (as it can represent the average human brain, I guess?) has difficulties imagining senses. The most obvious one is the taste, when I can't reproduce what others claim, with the same dished.
That reminds me that I have a big problem with some European languages, mainly the speaking. Can't properly make the correct sounds. While my niece growing up in German has no issue.
The music part, hmmm. I don't listen to classical music before. But later somehow I start listening to it. I can tell that over the years, although no body teaches me how to properly catch the details, myself has already developed better-than-before ear. Compared to 4 years ago, now I can tell some details of the music and kind of understand the expression of it. I guess that does not count as "training", but just listening a lot and repeat a lot makes enough difference.
I think the best way to understand how most people might be able to understand a new sensory type or added sensory depth, is by watching videos or people who can see or hear for the first time in their lives. Medical advancements have made mankind slowly approach the precipice of overcoming natural limitations as a species.