1. A method of analyzing and synthesizing a sound, comprising: a first step of providing analysis data based on an analysis of an original sound, said analysis data being indicative of plural components making up a waveform of the original sound; a second step of analyzing, from said analysis data, a characteristic concerning a predetermined sound element so as to extract data indicative of the analyzed characteristic as a sound parameter, the extracted sound parameter denoting a property of said element in the original sound; a third step of removing from said analysis data the characteristic corresponding to said extracted sound parameter; a fourth step of adding a processed characteristic corresponding to said sound parameter to said analysis data from which said characteristic has been removed; and a fifth step of synthesizing a sound waveform on the basis of said analysis data to which said processed characteristic has been added.