You know, this is a classic of hippity hop, recently acquired by me in a vinyl reissue. Melle Mel and some other guy rap in a most engaging manner to an ORCH5 heavy musical accompaniment. It is hard not to dance to this record, with the rapping being what carries you along as much as the music. Deadly stuff.
I'm going to a performance of Stravinsky's Firebird later this week; it will be interesting to hear the source of the ORCH5 sample. Hip hop don't stop! And wow, small world... it seems like the guy who made the ORCH5 sample is in fact yer man David Vorhaus, who was in The White Noise with Delia Derbyshire & Brian Hodgson. Sadly, the White Noise are not actually as brilliant as you might expect, though they have one really good song. It is called... 'Firebird'.
There is a nice picture of David Vorhaus here: Fairlight Week: Pt 4: The most famous preset ever