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If you take a look at a marimba, a marimba has different tones in each pad. Also, when you hit its volume and timber is slightly differently, in a concave design that is uneven to prevent reflection send back the geometric corrdinants to a processor that generates nerve signals and you have a replaceable eye. Senses can be regenerated accurately, if they are complicated enough. You can not have an overwhelming signal and must be celebrated sensitively. 
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