The CS-80 is a polyphonic synthesizer developed by Yamaha and released in 1977. It is known for its rich, warm sound and was one of the first synthesizers to feature a fully programmable interface. The CS-80 uses analog circuitry and offers a wide range of sounds, making it popular among musicians and composers. One of the standout features of the CS-80 is its expressive performance capabilities, including a unique ribbon controller for pitch bending. It has been used in various music genres and is particularly famous for its role in film scores, including the soundtrack for Blade Runner composed by Vangelis.