Hiiiiieee ! For what it may be worth, and probably nothing at that -
I recently inherited a vintage quadraphonic receiver, a Sansui QR 6500. This in turn, was a ticket to an internet rabbit hole full of men far, far older than myself - literally brimming with *all* the quad information.
Based on my limited knowledge I would think a true quadrophonic result in
Qlab might be affected by the source of the quad signals? Full disclosure, I've used i
Qlab but once. Anywho - I learned there are like, 3 different quad formats (at least in vinyl) 1 of which requires a criminally expensive stylus that only jives with records pressed in that format which has the fancy
carrier singal embedded in the
track.
Of course - if your source is from tape like reel-to-reel or 8
track, that also may be a success, but you will still need to pump it through a
system that has the whosiwhatsit (either QS or QS) matrix decoder.
All of this is probably only relevant if you want to be a purist about it.
https://www.quadraphonicquad.com/forums/
...has reasonable links and discussions. I'm almost certain I've seen a discussion on translating an analog quad signal to a digital source with pleasing results.
Alllllsoooo:
https://www.wendycarlos.com/surround/surround.html
The lady who brought us a good deal of the score to A CLOCKWORK ORANGE has a fantastic trove of knowledge on the subject.
But also I just stopped serving lurks and actually engaged in this forum for the first time ever. All the word vomits. You're so lucky.