Analysis of information sources in references of the Wikipedia article "فناوری موسیقی" in Persian language version.
In 1967, John Chowning, at Stanford University, accidentally discovered frequency modulation (FM) synthesis when experimenting with extreme vibrato effects in MUSIC-V. … By 1971 he was able to use FM synthesis to synthesizer musical instrument sounds, and this technique was later used to create the Yamaha DX synthesizer, the first commercially successful digital synthesizer, in the early 1980s.
By the time the first commercially successful digital instrument, the Yamaha DX7 (lifetime sales of two hundred thousand), appeared in 1983 ...(Note: the above sales number seems about whole DX series)
By the time the first commercially successful digital instrument, the Yamaha DX7 (lifetime sales of two hundred thousand), appeared in 1983 ...(Note: the above sales number seems about whole DX series)
