The Korg VC-10 is a 20-band analog vocoder - it’s used mainly for vocals and gives a ‘talking synthesizer’ or ‘robot voice’ effect. The polyphonic VC-10 came out in 1978 and features plenty of controls including speed, depth and octave. It is simple to use, you speak into the mic - the built-in gooseneck one, or an external one connected - and press the keys. It also has an input so you can use it to modulate another instrument. The VC-10 is used by artists such as Goldfrapp, Kraftwerk, Daft Punk, The Stranglers, Pink Floyd, Yes and Ty.