JPS6449092A - Musical sound synchronizer - Google Patents

Abstract

PURPOSE: To prevent the generation of a noise due to the discontinuity of waveform by previously working steady loop waveform data by cosine opposite phase addition and preparing data as steady waveform data. CONSTITUTION: A mixing part 16 prepares steady waveform data by executing cosine opposite phase addition based upon a steady loop waveform section and a mixing section and working waveform data. Namely, when a working instruction part selects a mixing section F and a steady loop waveform section L in order as continuous waveform data, the mixing part 16 obtains steady waveform data by using the first half part of the section L as the first half part of the steady waveform data and using data obtained by the cosine opposite phase addition of the latter half part data of the section L and the data of the section F as the latter half part of the steady waveform data. Thereby, the last part and foremost part of the obtained steady waveform data are mutually smoothly connected. Since mixing work is execued by the cosine opposite phase addition, only a simple repeated waveform is read out as a final musical sound waveform output and a smooth musical sound steady part is obtained.