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ASP-I and ASP-II (under development) are the CMOS single chip signal processor designed for the purpose of the sound field control for the electronic acoustic instruments. ASP-I, II are provided with the audio signal interface control, Multiplying/accumulating operation, external RAM control and IIR digital filter operation, and these operation can be performed concurrently. Plural IIR digital filter operation realizes the simulation for the frequency characteristic of reflection sound, and external RAM control as ring buffer realizes the echo pattern operation. With these features, the ASP-I, II can reproduce the realistic sound field of music halls, churchs, ect. and can control the sound field freely.

In the development of sound isolation type generators, a three-division case structure divided into two cool zones and one hot zone was studied. This study was aimed at achieving compatibility between sound isolation and cooling capabilities that are in a trade-off relationship. Sound isolation of 12.1 dB(LWA) was achieved by this structure, while obtaining equivalent cooling capabilities to that of open type generators. As a result of adopting this new generator structure for India domestic consumption, the compliance with the Indian noise regulation phase II was achieved for the first time by a mass produced generator.