UI (ooo-eee) were a post/math-rock group from New York active from the early 90's.
The band had a bit of a different approach in the genre with bass-heavy emphasis, opting for two bass players, à la groups like FULLARMOR. They also spruced their sound with timpani, tuba, synthesizers, and even banjo, with a strong reliance on overlapping samplers.
Came across their final full-length 'answers' (2003) recently, really diverse and fresh...could probably drop it in the pond somewhere between Tortoise and Don Caballero.
mind the graves