Complex sentence: Their songs are about what they were told-in the 80's-to expect of the future so there is constant allusion to retro sci-fi and their music uses analogue synthesisers, instead of the current trend for all-digital studio production.
Split into simpler sentences: Their songs are about what they were told in the 1980s to expect of the future, so there is constant allusion to retro sci-fi. Their music uses analogue synthesisers instead of the current trend for all-digital studio production.