I used to be really into this soundtrack when I was a teenager. Got back into it today. What a song!
There's something so fascinating to me about blending synthesizers and drum machines with a full orchestra. It's disheartening that this soundtrack is often credited to Giorgio Moroder, when the reality is that Moroder only wrote the awful theme song. It was Klaus that composed the actual soundtrack to the film.
I haven't been able to find any information about what equipment was used on this soundtrack, if anyone knows please share.