The last album
FM released before going into hiatus,
City of Fear showed the band moving more toward a pop sound while still retaining a firm grip on their progressive rock tendencies; though you could certainly point toward either
Rush or
Yes as comparison points for the sound of this album, it would probably be more accurate to look at the forward-thinking
Peter Gabriel albums from around the same period. The production is very crisp, songs are fairly tightly written, and there's a fairly dark and menacing edge to the sound here -- keyboards and other electric/electronic instruments add a fairly dissonant edge to the otherwise traditional songwriting, which adds a very fitting claustrophobic feel for an album so titled. ~ Sean Carruthers