It's been ages since I've heard that one. Why do you consider it something to steer clear of, 7/4? My (admittedly fuzzy) memories are not terribly positive nor overwhelmingly negative.
It wasn't representative of what his other work. Nothing like his first album Vernal Equinox or the albums that came after. Kind of a lame funk record as I remember.
Hassell has just the coolest sound. It sounds like he's just blowing through the horn, it really doesn't sound like a trumpet, more like a conch shell. Folks make a big deal about electronic processing (harmonizer), but it's used sparingly. We're really hearing just his horn most of the time. He was one of the first people to really use a sampler in the early '80s.
more later, I should listen to those early albums again.