the columbia pressings varied on this...but the chicago vi and vii tracks would always sound better in those days, because those lp's originally sounded better than the earlier ones when they all came out in the 1970's
I don't recall any specific problems with the album pressing per se, other than the usual tics and pops. Columbia's LP's were second to no other major label in the 70's, which of course was the nadir for pressing quality due to the 1973 oil crisis. Are you saying the pressings varied in quality, or the mastering? Columbia did in fact quietly reissue different masters of certain albums, but in all cases I know of it was to add or change content, not to upgrade quality. (Example: Toto's debut, initially issued with the single version of
Hold the Line and later with the long version.)
No, my gripe is with the master. Even considering the technical limitations of the day, it's just horrendous. There's no reason for those early tracks to sound so bad. Knowing that many quad titles were rush-released, I'm guessing they may not have had time to locate all the individual quad masters to dub, and instead used safety copies. If I'd been a band member and heard this release, I'd have taken hostages.
I think you may be wrong about early Chicago releases on LP sounding bad. The (stereo) Columbia releases I have from the time sound okay -- hissy and light on bass, but nothing like Chicago IX. In any case, we're talking about how they sound on a 1975 LP, not originally. The underlying recordings are solid, as the Chicago DVD-A's and individual quad albums attest.
I'd like to get my hands on a converion of II so I can get a good listen to the quad mix and compare to the DVD-A.
Took a listen to the stereo "Wishing You Were Here" -- damn, you're right about that missing guitar. How irritating. I've really only heard the quad mix for 31 years and never noticed.