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.