The Odyssey is a simplified hard-wired version of the Arp 2600 without the spring reverb and external patching possibilities. The Odyssey is a 37 key duophonic analog synthesiser created in response to the touring musicians’ demand for a portable, affordable and more performance focussed synthesiser. It quickly became ARP’s best-selling synthesiser model. The original Mk1 version was released in 1972, and this Mk3 model was released in 1978. The ARP Odyssey was used as the lead for Peter Howell's incarnation of the Doctor Who theme.