Yamaha CS-80

The Yamaha CS-80 is a polyphonic analog synthesizer released in 1976. It supports true 8-voice polyphony (with two independent synthesizer layers per voice) as well as a primitive (sound) settings memory based on a bank of micropotentiometers (rather than the digital programmable presets the Prophet-5 would sport soon after), and exceptionally complete performer expression features, such as a layered keyboard that was both velocity-sensitive (like a piano's) and pressure-sensitive ("after-touch") but unlike most modern keyboards the aftertouch could be applied to individual voices rather than in common, and a ribbon controller allowing for polyphonic pitch-bends and glissandos. This can be heard on the Blade Runner soundtrack by Vangelis, in which almost all the sounds were created from the CS-80, as well as the composer's soundtrack for the film Chariots of Fire.

Production of the instrument ceased in 1980. Vying with the Prophet 5, Jupiter 8 and OB-X polysynths, the CS-80 is regularly described as the pre-eminent polyphonic analog synthesizer manufactured, and commands amongst the highest prices of any polyphonic synthesizer so far made.