Have there been any "unreleased quad" mixes been eventually released over these later years? I'm not talking about new 5.1 type mixes. I'm talking about something old that was found and released as a SACD, DVDa, or Blu-ray. Just curious.
Here is a listing I've compiled to date.
Pink Floyd - Echoes
Gentle Giant - Freehand
Gentle Giant - In'terview
Jethro Tull - War Child (2 bonus tracks)
Jethro Tull - Minstrel In The Gallery
Jethro Tull - Too Old Too Rock And Roll , Too Young To Die
Jethro Tull - Songs From The Wood (4 tracks)
Laura Nyro - Eli and The 13th Confession
Paul Revere and The Raiders - Hard N' Heavy
Gong -You (2 versions)
King Crimson - Pittsburg 1974
Ray Thomas - From Mighty Oaks*
Grateful Dead - Movie*
Grateful Dead - Closing Of Winterland*
Santana - Lotus (7 bonus tracks)
David Bowie - David Live*
David Bowie - Stage*
Frank Zappa - QuAUADIOPHILIAc*
Frank Zappa - Baby Snakes*
Billy Cobham - Spectrum
The Rolling Stones - Ladies And Gentlemen*
Charles Gerhardt - The Thing From Another Planet
-and many From DG , DECCA , LONDON , PHILLIPS via Pentatone
*mixed from quad to 5.1 , in most cases.
(Edit-twice)