Blind tests usually seem to demonstrate that people's ears are not as delicate and discerning as they thinkhttps://twitter.com/mental_floss/status/861715595770953728 …
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It's a confounding factor in something which is already subtle and difficult to test. The senses do not operate in isolation.
Are you saying that not seeing the violin impairs one's ability to evaluate its sound? Bad news for recorded music, I guess
Especially given the fact that even most seasoned listeners probably couldn't distinguish two makes of violin by sight
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