In 1976, in order to buy a synthesizer, it was the time when tens of thousands of dollars or more had to be paid. However, there was a boy who is anxious for getting a synthesizer. "If I cannot buy it, it must be made by me". The boy who thought began to collect parts by mail order with reference to the advertisement carried by the magazine "transistor technology." It was two years after that the rough box played music.

I performed the concert which used this synthesizer in the cultural festival of a high school on October 21, 1978.