Earlier quoted context omitted.
> Imo, Vangelis brought the synthesizer from an experimental novelty to an instrument for composition. The two sounds I associate with him are the long brassy triangle with a steep envelope that we know from both Blade Runner and the accompaniment to the piano in the Chariots of Fire theme, and his effective use of chimes. One of the most memorable parts of the Blade Runner soundtrack is the brass synth that casually…
The brass you hear in Vangelis is probably an Oberheim OB-Xa, incredible brass sounds. The band toto made those sounds extremely popular here in the states too. Google who the Porcaro brothers were (well one is still alive and kicking :) )
... but AFAIK the Blade Runner theme was famously done on a CS-80