Abstract: A sound generator for an electronic musical instrument produces sounds from waveform data combinations stored in a memory. Each of the waveform data combinations is a data combination obtained from a waveform of a natural sound by digital data conversion preferably including information condensation. The selection of a waveform data combination is performed by an address generator which produces an address signal for the memory from an information from a keyboard. The information includes a touch information representing key depressing speed and/or strength, or both of the touch information and a pitch information. The loudness level of a generated tone is controlled by a loudness controller in response to the touch information, or to both of the touch information and pitch information.

Abstract: A wave generating method and a wave generating apparatus using the method are arranged such that plurality of wave samples, each being generated successively, are respectively weighted by, for example, being multiplied by a plurality of wave functions generated corresponding to the plurality of wave samples. The plurality of weighted wave samples are summed to obtain a desired wave. The kind of each of the plurality of wave samples generated successively is changed at each time when the value of corresponding one of the plurality of wave functions becomes zero.