...Only rule is that the song cannot officially exist in MCH at all (like if it’s a bad mix and you want a redo- that's a topic for another thread I guess).
I don't want to come off as greedy or entitled, as getting any surround mix released is a victory for our community, but I doubt I'm alone in thinking there are plenty of surround mixes out there that don't quite hit the target. And who knows, sometimes these things do happen...I can think of plenty of albums that have multiple surround versions, be it quad and 5.1 counterparts OR multiple quads OR multiple 5.1s!
Here's a few off the top of my head:
Blue Oyster Cult- Agents Of Fortune (5.1 SACD)
This isn't awful (it definitely benefits from boosting the rears), but it pales in comparison to the jaw-dropping quad mixes of Tyranny & Mutation and Secret Treaties.
This old post makes me wonder if there is actually an old quad mix in the vein of those two out there somewhere: https://www.quadraphonicquad.com/fo...e-oyster-cult-agents-of-fortune-release.7527/
Rush- Moving Pictures (5.1 DVD-A)
Another one that's not awful (it is my go-to over the stereo) but hasn't been realized to its full surround potential...there may be hope now that SW is working with Rush.
Steely Dan- Pretzel Logic (1970s QS LP/Q8 Tape)
Can't complain enough about this one...pales in comparison to both the ultra-active quads of CBAT & Countdown and the classy ES 5.1s of the last 3 albums (and 3 DF solo releases).
Simon & Garfunkel- Bridge Over Troubled Water (1970s SQ LP/Q8 Tape)
This may be controversial. This mix has some really nice moments ("So Long, Frank Lloyd Wright" and "Baby Driver" are handled very nicely), but is at other times frustratingly non-discrete (the title track and "El Condor Pasa" sound mostly ambient). The rest falls somewhere in between. Doubt we'd ever get a re-do of this, much less a reissue of the quad.
Beach Boys- Pet Sounds (5.1 DVD-A)
Again, so much more potential here than what was done IMO...