Marimba is much more of a wood-type experience and there is no real possibility of getting a dry sound and getting that contrast in the same way that you can in a vibraphone.
Once you're in a particular country and you're surrounded by musicians who are so adept at traditional music you suddenly realize how much there is to explore and digest and learn and experience.
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Now having had this experience I can't say really what they were looking for. I don't know their minds. But every time I see a reality show it seems that the most entertaining parts on other reality shows are when they make their guests look foolish.