The Yamaha DX7 is a digital synthesizer that was first released in 1983. It is known for its use of frequency modulation (FM) synthesis, which allows for the creation of complex and rich sounds. The DX7 became popular in the music industry for its ability to produce unique tones that were difficult to achieve with analog synthesizers. The DX7 features a 61-key keyboard and offers a range of preset sounds, including electric pianos, brass, and strings. Its user interface includes a series of buttons and sliders for sound manipulation, making it accessible for musicians and producers. The DX7 has influenced many genres, particularly pop and rock music.