The Yamaha CS-80 is a polyphonic synthesizer introduced in 1976, known for its rich sound and expressive capabilities. It features 8 voices and offers a wide range of modulation options, including an innovative aftertouch feature that allows musicians to control sound dynamics by applying pressure to the keys. This synthesizer is equipped with two oscillators per voice, enabling complex sound design. The CS-80 is also notable for its iconic wooden casing and extensive control panel, making it a favorite among composers and performers, including notable artists like Vangelis and Jean-Michel Jarre.