Overview
One of his most obscure albums, Invisible Connections is quite different from the majority of Vangelis's work. It has been compared to minimalist experimental music.
Despite this, it can very loosely be said to belong to a trilogy of his '80s albums, the other two being Soil Festivities from 1984, and Mask from the same year as Invisible Connections.
These all feature a willingness of the artist, at this time, to experiment with not only music itself, but his own album release-patterns, as the content differs so markedly from the style he was known for, up to this point. In fact, it may be that he was deliberately, and consciously, returning to a style he began in 1978, when he released Beaubourg, an album which is as experimental as Invisible Connections.
Though Hypothesis, released in 1978, but recorded in 1971 is also considered to be another "experimental" album, it was a release which Vangelis did not sanction, and, besides, it was musically geared towards jazz fusion rather than the minimalist style of the albums, above.
Read more about this topic: Invisible Connections