Yes - I have that one - and agreed its near the bottom of my list of Yes albums:
Yes debuts the surround sound process pioneered by Seattle Audio Imaging Labs, Inc. (SAIL). SAIL has invented an encoding system that makes music consistently compatible with today's home theater systems. Having eliminated image collapse and synamic frequency response aberrations, the SAIL process results in a superior surround sound experience without any enhancements to the hardware components. For those without surround sound systems, meaning regular stereo systems, there is no difference in output from standard stereo. To make music compatible with today's surround sound systems, SAIL used their REcode process for the album. REcode is a mastering process that renders stereo or two-track material in SAIL surround sound. The process detects the statistical average of the spatial field and translates that to the placement of images in the surround sound field.
do you know I've picked this one up and put it back down again so many times.. torn between the potential quality of the "surround" and the quality of the music itself!