In 1975, the Japanese company Yamaha licensed the algorithms for frequency modulation synthesis (FM synthesis) fromJohn Chowning, who had experimented with it at Stanford University since 1971. Yamaha's engineers began adapting Chowning's algorithm for use in a digital synthesizer, adding improvements such as the "key scaling" method to avoid the introduction of distortion that normally occurred in analog systems during frequency modulation. However, the first commercial digital synthesizer to be released would be the Australian Fairlight company's Fairlight CMI (Computer Musical Instrument) in 1979, as the first practical polyphonic digital synthesizer/sampler system.
In 1980, Yamaha eventually released the first FM digital synthesizer, the Yamaha GS-1, but at an expensive price. In 1983, Yamaha introduced the first stand-alone digital synthesizer, the DX-7, which also used FM synthesis and would become one of the best-selling synthesizers of all time. The DX-7 was known for its recognizable bright tonalities that was partly due to an overachieving sampling rate of 57 kHz.
Barry Vercoe describes one of his experiences with early computer sounds:
At IRCAM in Paris in 1982, flutist Larry Beauregard had connected his flute to DiGiugno's 4X audio processor, enabling real-time pitch-following. On a Guggenheim at the time, I extended this concept to real-time score-following with automatic synchronized accompaniment, and over the next two years Larry and I gave numerous demonstrations of the computer as a chamber musician, playing Handel flute sonatas,Boulez's Sonatine for flute and piano and by 1984 my own Synapse II for flute and computer—the first piece ever composed expressly for such a setup. A major challenge was finding the right software constructs to support highly sensitive and responsive accompaniment. All of this was pre-MIDI, but the results were impressive even though heavy doses of tempo rubato would continually surprise my Synthetic Performer. In 1985 we solved the tempo rubato problem by incorporating learning from rehearsals (each time you played this way the machine would get better). We were also now tracking violin, since our brilliant, young flautist had contracted a fatal cancer. Moreover, this version used a new standard called MIDI, and here I was ably assisted by former student Miller Puckette, whose initial concepts for this task he later expanded into a program called MAX.